Difference between revisions of "OpenFOAM/C3/Simulating-Hagen-Poiseuille-flow/English"

From Script | Spoken-Tutorial
Jump to: navigation, search
(Created page with 'Tutorial: To simulate Hagen-Poiseuille flow in OpenFOAM. Script and Narration : Saurabh S. Sawant Keywords: Video tutorial,CFD. {| style="border-spacing:0;" | style="bord…')
 
 
(12 intermediate revisions by 3 users not shown)
Line 1: Line 1:
 
Tutorial: To simulate Hagen-Poiseuille flow in OpenFOAM.
 
Tutorial: To simulate Hagen-Poiseuille flow in OpenFOAM.
−
 
  
 
Script and Narration : Saurabh S. Sawant
 
Script and Narration : Saurabh S. Sawant
−
 
  
 
Keywords: Video tutorial,CFD.  
 
Keywords: Video tutorial,CFD.  
Line 9: Line 7:
  
  
−
{| style="border-spacing:0;"
+
{|Border=1
−
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>Visual Cue</center>
+
!Visual Cue
−
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>Narration</center>
+
!Narration
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1:
+
| Slide 1:
  
−
 
+
| Hello and welcome to the spoken tutorial on simulating '''Hagen-Poiseuille flow''' in '''OpenFOAM'''
−
 
+
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on simulating '''Hagen-Poiseuille flow''' in '''OpenFOAM'''.
+
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2 : Learning Objectives
+
| Slide 2 : Learning Objectives
  
  
  
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we will see:
+
| In this tutorial we will see:
  
 +
* To create and '''mesh 3D cylindrical pipe'''<br/>
  
−
* To create and '''mesh 3D cylindrical pipe.'''<br/>
+
* To '''simulate '''the '''Hagen-Poiseuille flow''' <br/> having''' fixed pressure ratio''' across '''boundaries'''<br/> and
−
 
+
−
* To '''simulate '''the '''Hagen-Poiseuille flow''' <br/> having''' fixed pressure ratio''' across '''boundaries.'''<br/>  
+
−
 
+
−
* To visualize the '''velocity contour '''in '''ParaView'''.
+
−
 
+
  
 +
* To visualize the '''velocity contour '''in '''ParaView'''
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3: System Requirement  
+
| Slide 3: System Requirement  
  
 +
| To record this tutorial, I am using
  
 +
*'''Linux Operating system Ubuntu '''12.04
  
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To record this tutorial
+
*'''OpenFOAM version '''2.1.1  and
  
 +
*'''ParaView''' '''version '''3.12.0
  
−
I am using '''Linux''' '''Operating system''' '''Ubuntu '''12.04
+
|-
−
 
+
| Slide 4: System Requirement
−
 
+
−
'''OpenFOAM version '''2.1.1
+
  
 +
The tutorials were recorded using the versions specified in previous slide
  
−
'''ParaView''' '''version '''3.12.0
+
Subsequently the tutorials were edited to latest versions
  
 +
To install latest system requirements go to Installation Sheet
 +
|
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: Prerequisites
+
| Slide 5: Prerequisites
−
 
+
−
 
+
−
 
+
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To practice this tutorial learner should have the knowledge of
+
−
 
+
−
Basic '''Fluid Dynamics'''
+
−
 
+
−
and '''Hagen-Poiseuille''' '''flow'''
+
−
 
+
  
 +
| To practice this tutorial learner should have the knowledge of
  
 +
*Basic '''Fluid Dynamics'''
 +
*and '''Hagen-Poiseuille flow'''
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5:
+
| Slide 6:
  
 
Hagen-Poiseuille Flow Diagram
 
Hagen-Poiseuille Flow Diagram
Line 73: Line 64:
  
 
Read aloud the given points and show the contents in the diagram with the mouse pointer.
 
Read aloud the given points and show the contents in the diagram with the mouse pointer.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Here is, '''Hagen-Poiseuille''' '''Flow''' Diagram.
+
| Here is, '''Hagen-Poiseuille Flow''' diagram.
  
 +
We can see the '''dimensions''' and '''boundaries''' of the pipe.
  
−
We can see the '''dimensions and boundaries''' of the pipe.
+
'''Viscosity''' of the fluid used, that is, water is given.
−
 
+
−
 
+
−
'''Viscosity''' of fluid used, that is, water is given.
+
−
 
+
−
 
+
−
Pressure at the '''inlet''' is 20''' Pascals''' and '''outlet''' is 0''' Pascals.'''
+
  
 +
Pressure at the '''inlet''' is 20''' Pascals''' and at the '''outlet''' it is 0''' Pascals'''.
  
 
As it is an '''incompressible flow''', only the pressure difference is of importance.
 
As it is an '''incompressible flow''', only the pressure difference is of importance.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6:
+
| Slide 7:
  
 
Formulas and Analytical Solution
 
Formulas and Analytical Solution
−
 
  
 
Read aloud the given points
 
Read aloud the given points
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Formulas and Analytical Solution:'''
+
| '''Formulas and Analytical Solution:'''
−
 
+
−
 
+
−
For '''Hagen-Poiseuille flow,'''
+
−
 
+
−
 
+
−
'''Pressure drop''' along the pipe is:
+
  
 +
For '''Hagen-Poiseuille flow, Pressure drop''' along the pipe is:
  
−
('''P1 minus P2''') equals ('''32 mew Uaverage L''') upon ('''D square''')
+
('''P1 minus P2''') equals ('''32 mu Uaverage L''') upon ('''D square''')
  
  
 
By substituting the values from the previous diagram, we get,
 
By substituting the values from the previous diagram, we get,
  
−
'''Uaverage''' equals to 0.208 '''m/s'''
+
*'''Uaverage''' equals to 0.208 '''m/s'''
  
 +
*'''Maximum Velocity''' is given as,
  
−
'''Maximum Velocity''' is given as,
 
  
 
Two times the '''average velocity''', which would be, 0.416''' m/s'''
 
Two times the '''average velocity''', which would be, 0.416''' m/s'''
Line 119: Line 100:
  
 
'''Uaverage '''into '''D '''upon '''nu''', that comes out to be, '''2080'''
 
'''Uaverage '''into '''D '''upon '''nu''', that comes out to be, '''2080'''
 +
  
 
Hence, the flow is '''transient'''.
 
Hence, the flow is '''transient'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7: Transient Solver
+
| Slide 8: Solver
  
 +
| Type of '''solver''' used here is '''icoFOAM'''.
  
  
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type of solver used here is,
+
It is a '''Transient Solver'''.
  
−
'''IcoFOAM'''
+
It is used for '''incompressible, laminar flow''' of '''Newtonian fluid'''.
−
 
+
−
 
+
−
It is a '''Transient Solver'''
+
−
 
+
−
 
+
−
It is used for '''incompressible, laminar flow of Newtonian fluids.'''
+
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8:
+
| Slide 9:
  
 
Pressure Boundary Conditions
 
Pressure Boundary Conditions
  
 +
| '''Pressure Boundary Conditions '''used,
  
 +
*At '''Inlet: fixedPressure'''
  
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Pressure Boundary Conditions '''used,
+
*At '''Outlet: fixedPressure'''
−
 
+
−
 
+
−
At '''Inlet: fixedPressure'''
+
−
 
+
−
At '''Outlet: fixedPressure'''
+
−
 
+
−
At '''Walls: ZeroGradient'''
+
−
 
+
−
 
+
  
 +
*At '''Walls: ZeroGradient'''
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 9:
+
| Slide 10:
  
 
Velocity Boundary Conditions
 
Velocity Boundary Conditions
  
 +
| '''Velocity Boundary Conditions''' used,
  
 +
*At '''Inlet: pressureInletVelocity'''
  
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Velocity Boundary Conditions''' used,
+
*At '''Outlet: zeroGradient'''
  
−
 
+
*At '''Walls: fixedValue'''
−
At '''Inlet: pressureInletVelocity'''
+
−
 
+
−
At '''Outlet: zeroGradient'''
+
−
 
+
−
At '''Walls: fixedValue'''
+
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Show 3dpipe folder.
+
| Show 3dpipe folder.
−
 
+
  
 
Show the 3dpipe folder
 
Show the 3dpipe folder
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| For executing this case,
+
| For executing this case, first let's create the '''case directory''' in the ''''icoFoam'''' folder.
−
 
+
−
 
+
−
First, Let's create the '''case directory''' in ''''icoFoam'''' folder.
+
−
 
+
−
Give it some name.
+
  
 +
And give it some name.
  
 
I have named it as''' '3dpipe''''.
 
I have named it as''' '3dpipe''''.
−
 
−
 
−
 
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point the mouse pointer from lid driven folder to 3d pipe folder.
+
| Point the mouse pointer from lid driven folder to 3d pipe folder.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To know the location of this folder, go through the tutorial on '''lid driven cavity'''.
+
| To know the location of this folder, go through the tutorial on '''lid driven cavity'''.
−
 
+
−
 
+
−
Copy the ''''0' (zero), 'constant'''' and ''''system'''' folders of '''lid driven cavity''' problem in the newly created folder.
+
−
 
+
−
 
+
  
 +
Copy this ''''0' (zero), 'constant'''' and ''''system'''' folders of '''lid driven cavity''' problem in the newly created folder.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Go inside the 3dpipe folder.
+
| Go inside the 3dpipe folder.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's go inside the ''''3dpipe'''' folder.
+
| Let's go inside the ''''3dpipe'''' folder.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Hover the pointer over the folder inside the 3dpipe folder.
+
| Hover the pointer over the folder inside the 3dpipe folder.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I have already copied the folders into my ''''3dpipe'''' folder and modified the files in it.
+
| I have already copied the folders into my ''''3dpipe'''' folder and modified the files in it.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Go into the '0' folder and open P file and show it
+
| Go into the '0' folder and open P file and show it
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, let's go into the ''''0'''' folder.
+
| Now, let's go into the ''''0'''' folder and open the ''''P'''' file.
−
 
+
−
 
+
−
And open the ''''P'''' file.
+
−
 
+
  
 
This is the''' pressure boundary condition''' file.
 
This is the''' pressure boundary condition''' file.
  
−
 
+
|-
−
 
+
| Show the pressure boundary condition file and show the dimensions inside it.
 +
| Note that the dimensions are in '''(meter square) per (second square)''' '''(m2/s2)'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Show the pressure boundary condition file and show the dimensions inside it.
+
| Show the pressure value written
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Note that the dimensions are in '''(meter square) per (second square)''' '''(m2/s2)'''.
+
| Hence the''' pressure '''value in '''Pascals''' is divided by the '''density''', that is, 1000''' Kg/m3 (Kg per meter cube),''' and written here.  
−
 
+
−
 
+
−
 
+
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Show the pressure value written
+
| Close the file
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hence the''' pressure '''value in '''pascals''' is divided by '''density''', that is, 1000''' Kg/m3''' '''(Kg per meter cube),''' and written here.  
+
| Let's close the file.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Close the file
+
| Open U file in the same folder and show.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's close the file.
+
| File containing the '''velocity boundary condition '''is as seen.
  
−
|-
+
Let's open the file we can see the '''velocity boundary condition ''' for inlet, outlet and fixed walls.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open U file in the same folder and show
+
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| File containing '''velocity boundary condition '''is as shown:
+
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Close the file and come out of the '0' folder
+
| Close the file and come out of the '0' folder.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's close the file and come out of the ''''0'''' folder.
+
| Let's close the file and come out of the ''''0'''' folder.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Switch back to the slides
+
| Switch back to the slides.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To see the '''blocking strategy''', let me switch back to the slides.
+
| To see the '''blocking strategy''', let me switch back to the slides.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10: Blocking Strategy
+
| Slide 11: Blocking Strategy
  
 
Hover the pointer on the geometry and drag it towards the z direction.
 
Hover the pointer on the geometry and drag it towards the z direction.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To create a '''3D geometry''' of a pipe I have made a '''2D''' circular '''geometry '''and extruded the length in the z direction.
+
| To create a '''3D geometry''' of a pipe I have made a '''2D circular geometry '''and extruded the length in z direction.
−
 
+
−
 
+
−
 
+
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point out the numbering pattern.
+
| Point out the numbering pattern.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Numbering Pattern is as shown.
+
| Numbering pattern is as shown. We can also see the dimension of the '''mesh'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Minimize the slides
+
| Minimize the slides
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To see the '''blockMeshDict''' file, let's minimize the slides.
+
| To see the '''blockMeshDict''' file, let's minimize the slides.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Go to folder 'constant' and then 'polyMesh' and open blockMeshDict file and show it.
+
| Go to folder 'constant' and then 'polyMesh' and open blockMeshDict file and show it.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's go into the folder ''''constant',''' and then ''''polyMesh'.'''
+
| Let's go into the folder ''''constant',''' and then ''''polyMesh''''.
−
 
+
−
Final '''blockMeshDict '''file is as shown:
+
  
 +
Let's open the'''blockMeshDict ' file.
  
 +
We can see the vertices, blocks,edges and boundaries  for '''inlet, outlet''' and '''fixed walls'''.
  
 +
|-
 +
| Close the file and come out of the folder 'polyMesh
 +
| Let's close the file and lets  come out of the ''''polyMesh'''' folder.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Close the file and come out of the folder 'constant'
+
| Open and show transportProperties file and point at the value viscosity value
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's close the file and come out of the ''''constant'''' folder.
+
| We see the ''''transportProperties''''file. Lets open the file.
  
−
|-
 
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open and show transportProperties file and point at the value viscosity value
 
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We see the ''''transportProperties' '''file.
 
  
−
Note the '''dynamic viscosity '''value, here, is 1e-06.
+
Note the '''dynamic viscosity '''value, here is 1 into 10 raise to minus 6.
  
 +
|-
 +
| Close the file and come out of the 'constant' folder.
 +
| Let's close the file and come out of the folder '''constant'''.
  
 +
|-
 +
| Go into the system folder and open the controlDict file. Show it.
 +
| Let's go into the ''''system'''' folder.
  
 +
Now, let's have a look at the ''''controlDict'''' file.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Close the file and come out of the 'constant' folder.
+
| Show time step value
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's close the file and come out to the ''''constant' '''folder.
+
| The solution '''converges''' after 18 seconds therefore the final '''time step''' is kept 19.
  
−
|-
 
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Go into the system folder and open the controlDict file. Show it.
 
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's go into the ''''system'''' folder.
 
  
−
Now, let's have a look at the ''''controlDict'''' file.  
+
The '''time step''' has been set to 1 into 10 raise to minus 3.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Show time step value
+
| Close the file and the Home folder.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The '''time step''' has been set to 1e-03.
+
| Let's close the file.
  
−
The solution '''converges''' after 18 seconds. The final '''time step''' is kept 19.
+
Let's close the ''''Home'''' folder.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Close the file and the Home folder
+
| Press ''''Control', 'Alt'''' and ''''T'''' keys altogether.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's close the file.
+
| Now to '''execute''' the '''case''', we will first go inside the ''''3dpipe'''' folder through '''terminal'''.
  
−
Let's close the ''''Home'''' folder.
 
  
−
|-
+
Let's open the '''terminal''' by pressing ''''Control', 'Alt' '''and''' 'T'''' key altogether.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Press 'control', 'alt' and 't' keys altogether
+
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to '''execute''' the case, we will, first, go inside the ''''3dpipe'''' folder through terminal.Let's open the terminal by pressing ''''control', 'alt' '''and''' 't'''' keys, altogether.
+
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type run and press Enter in the terminal.
+
| Type run and press '''Enter''' in the '''terminal'''.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''run''' and press '''Enter'''
+
| Type '''run''' and press '''Enter'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd (space) tutorials and press Enter
+
| Type cd (space) tutorials and press Enter.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''cd''' '''(space) tutorials''' and press '''Enter'''
+
| Type '''cd (space) tutorials''' and press '''Enter'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd (space) incompressible and press Enter
+
| Type cd (space) incompressible and press Enter
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''cd (space)''' '''incompressible''' and press '''Enter'''
+
| Type '''cd (space) incompressible''' and press '''Enter'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd (space) icoFoam and press Enter
+
| Type cd (space) icoFoam and press Enter
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''cd''' '''(space)''' '''icoFoam '''and press '''Enter'''
+
| Type '''cd (space) icoFoam '''and press '''Enter'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd (space) 3Dpipe and press Enter
+
| Type cd (space) 3dpipe and press Enter
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Type '''cd (space)''' '''3Dpipe '''and press '''Enter'''
+
| Type '''cd (space) 3dpipe '''and press '''Enter'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type blockMesh and press Enter
+
| Type blockMesh and press Enter
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now to create the '''mesh''', type '''blockMesh''' and press '''Enter'''.  
+
| Now to create the '''mesh''', type '''blockMesh''' and press '''Enter'''.
  
 
'''Meshing''' has been done.
 
'''Meshing''' has been done.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| After the meshing is done, type icoFoam to start the iterations
+
| After the meshing is done, type icoFoam to start the iterations
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To start the '''iterations''' type '''icoFoam''' and press '''Enter'''.  
+
| To start the '''iterations''' type '''icoFoam''' and press '''Enter''' .
  
−
We can see the '''iterations''' running.
+
We see the '''iterations''' are  running.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| After the iterations are done, type paraFoam for postprocessing the results and press Enter.
+
| After the iterations are done, type paraFoam for postprocessing the results and press Enter.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Iterations has been done.
+
| '''Iterations''' has been done.
  
−
After the '''iterations''' end type '''paraFoam''' for '''postprocessing''' the results and press '''Enter'''.  
+
After the '''iterations''' end, type '''paraFoam''' for '''postprocessing''' the results and press '''Enter'''.  
  
 +
 +
It will open the" ParaView". This is " ParaView".
 +
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on Apply.
+
| Click on Apply.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's click on '''Apply''' on the left hand side of the '''Object inspector menu''' to see the''' geometry.'''
+
| Let's click on '''Apply''' on the left hand side of the '''Object inspector menu''' to see the''' geometry'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Rotate the geometry by pressing the button of the mouse and move it in the required direction.
+
| Rotate the geometry by pressing the button of the mouse and move it in the required direction.
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's rotate the '''geometry''' for a better view.
+
| Let's rotate the '''geometry''' for a better view.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on the active variable control menu and select U in the drop-down menu  
+
| Click on the active variable control menu and select U in the drop-down menu  
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Click on the '''active variable control menu''' and select '''U''' in the drop-down menu.
+
| Click on the '''active variable control menu''' and select '''U''' in the drop-down menu.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on play button
+
| Click on play button
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| At the top, in '''VCR toolbar''', click on '''Play''' button.
+
| At the top, in '''VCR toolbar''', click on '''Play''' button.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Go to Object Inspector menu, go to Display, click on Rescale data range
+
| Go to Object Inspector menu, go to Display, click on Rescale data range
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Go to '''Object Inspector menu''', go to '''Display''', click on '''Rescale''' '''data range.'''
+
| Go to '''Object Inspector menu''', go to '''Display''', click on '''Rescale''' to '''data range'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| go to the toolbar named common, click on Clips and press Apply
+
| go to the toolbar named common, click on Clips and press Apply
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the half section, go to the toolbar named '''common''', click on '''Clips''' and press '''Apply'''.
+
| To view the half section, go to the toolbar named '''common''', click on '''Clips'''.
 +
 
 +
Go to '''Object Inspector''' menu properties and press '''Apply'''.
 +
 
 +
Let's zoom in.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the color legent
+
| Open the color legend
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's open the '''color legend.'''
+
| Let's open the '''color legend'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|  
+
|  
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We can see the '''maximum velocity''' is near to the actual '''maximum velocity'''.
+
| We can see the '''maximum velocity''' is near to the actual '''maximum velocity'''that is 0.40 meters per second.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Go to Filters> Data Analysis> Plot Over Lines
+
| Go to Filters> Data Analysis> Plot Over Lines
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To view the graph Go to '''Filters'''> '''Data Analysis'''> '''Plot Over Lines.'''
+
| To view the graph go to '''Filters''' at the top, '''Data Analysis''' and press '''Plot Over Line'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| click on Y axis and press Apply
+
| Click on Y axis and press Apply
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's click on '''Y''' axis and press '''Apply'''.
+
|Press '''Y''' axis and press '''Apply'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point towards the parabolic profile
+
| Point towards the parabolic profile
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We see the '''parabolic''' '''profile''' for '''Hagen-Poiseuille flow'''.
+
| We can see the '''parabolic profile''' for '''Hagen-Poiseuille flow'''.
−
 
+
−
 
+
−
 
+
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Close the graph
+
| Close the graph
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's close the '''graph'''.
+
| Let's close the '''graph'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Close ParaView
+
| Close ParaView
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Close '''ParaView'''.
+
| Let's close '''ParaView'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Switch to the slides
+
| Switch to the slides
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's switch to the''' slides'''.
+
|And switch to the''' slides'''.
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11: Summary
+
| Slide 12: Summary
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In this tutorial we have learned:
+
| In this tutorial we have learnt:
  
−
 
+
*To create and '''mesh 3D pipe geometry
−
To create '''3D pipe geometry.'''To simulate '''Hagen-Poiseuille flow''' for a '''fixed pressure ratio.'''
+
*To simulate '''Hagen-Poiseuille flow''' for a '''fixed pressure ratio''' across boundaries and
−
 
+
*To visualize the '''velocity''' results in '''Parafoam '''
−
To visualize the '''velocity''' results in '''ParaView'''.
+
−
 
+
−
This brings us to the end of the tutorial.
+
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12 : Assignment
+
| Slide 13 : Assignment
−
 
+
−
 
+
−
 
+
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| As an assignment,
+
−
 
+
−
 
+
−
Change the '''geometry parameters '''such as length and diameter.
+
−
 
+
  
−
Change the corresponding '''pressure ratio.'''
 
  
  
−
Use the fluid of different '''viscosity.'''
+
| As an assignment,
  
 +
Change the '''geometry parameters '''such as length and diameter
  
 +
Change the corresponding '''pressure ratio''' and
  
 +
Use the fluid of different '''viscosity'''
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: About Spoken tutorials
+
| Slide 14: About Spoken tutorials
  
−
 
+
|
−
 
+
* Watch the video available at the following link  
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| * Watch the video available at the following link  
+
  
 
* It summarises the Spoken Tutorial project  
 
* It summarises the Spoken Tutorial project  
  
 
* If you do not have good bandwidth, you can download and watch it  
 
* If you do not have good bandwidth, you can download and watch it  
−
 
−
 
  
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 14: About Spoken tutorials
+
| Slide 15: About Spoken tutorials
−
 
+
−
 
+
  
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team  
+
| The Spoken Tutorial Project Team  
  
 
* Conducts workshops using spoken tutorials  
 
* Conducts workshops using spoken tutorials  
Line 466: Line 402:
 
* For more details, please write to contact at spoken hyphen tutorial dot org  
 
* For more details, please write to contact at spoken hyphen tutorial dot org  
  
 +
|-
 +
| Slide 16: Forum to answer questions
  
 +
* Do you have questions on THIS Spoken Tutorial?
 +
* Choose the minute and second where you have the question
 +
* Explain your question briefly
 +
* Someone from the FOSSEE team will answer them. Please visit
 +
http://forums.spoken-tutorial.org/
 +
|
 +
|-
 +
| Slide 17: Forum to answer questions
  
 +
* Questions not related to the Spoken Tutorial?
 +
* Do you have general/technical questions on the Software?
 +
* Please visit the FOSSEE forum
 +
http://forums.fossee.in/
 +
* Choose the Software and post your question
 +
|
 
|-
 
|-
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 15: Acknowledgement
+
| Slide 18: Lab Migration project
  
 +
* We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
 +
* We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM
 +
For more details visit this site:
 +
http://cfd.fossee.in/
 +
|
 +
|-
 +
| Slide 19: Case Study project
  
 +
* We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
 +
* We give honorarium and certificate to those who do this
 +
For more details visit this site:
 +
http://cfd.fossee.in/
 +
|
 +
|-
 +
| Slide 20: Acknowledgement
  
−
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorial Project is a part of the Talk to a Teacher project  
+
| Spoken Tutorial Project is a part of the Talk to a Teacher project  
  
 
* It is supported by the National Mission on Education through ICT, MHRD, Government of India  
 
* It is supported by the National Mission on Education through ICT, MHRD, Government of India  
Line 480: Line 446:
  
 
* spoken hyphen tutorial dot org slash NMEICT hyphen Intro  
 
* spoken hyphen tutorial dot org slash NMEICT hyphen Intro  
−
 
−
 
−
 
 
|}
 
|}

Latest revision as of 10:31, 22 August 2019

Tutorial: To simulate Hagen-Poiseuille flow in OpenFOAM.

Script and Narration : Saurabh S. Sawant

Keywords: Video tutorial,CFD.


Visual Cue Narration
Slide 1: Hello and welcome to the spoken tutorial on simulating Hagen-Poiseuille flow in OpenFOAM
Slide 2 : Learning Objectives


In this tutorial we will see:
  • To create and mesh 3D cylindrical pipe
  • To simulate the Hagen-Poiseuille flow
    having fixed pressure ratio across boundaries
    and
  • To visualize the velocity contour in ParaView
Slide 3: System Requirement To record this tutorial, I am using
  • Linux Operating system Ubuntu 12.04
  • OpenFOAM version 2.1.1 and
  • ParaView version 3.12.0
Slide 4: System Requirement

The tutorials were recorded using the versions specified in previous slide

Subsequently the tutorials were edited to latest versions

To install latest system requirements go to Installation Sheet

Slide 5: Prerequisites To practice this tutorial learner should have the knowledge of
  • Basic Fluid Dynamics
  • and Hagen-Poiseuille flow
Slide 6:

Hagen-Poiseuille Flow Diagram


Read aloud the given points and show the contents in the diagram with the mouse pointer.

Here is, Hagen-Poiseuille Flow diagram.

We can see the dimensions and boundaries of the pipe.

Viscosity of the fluid used, that is, water is given.

Pressure at the inlet is 20 Pascals and at the outlet it is 0 Pascals.

As it is an incompressible flow, only the pressure difference is of importance.

Slide 7:

Formulas and Analytical Solution

Read aloud the given points

Formulas and Analytical Solution:

For Hagen-Poiseuille flow, Pressure drop along the pipe is:

(P1 minus P2) equals (32 mu Uaverage L) upon (D square)


By substituting the values from the previous diagram, we get,

  • Uaverage equals to 0.208 m/s
  • Maximum Velocity is given as,


Two times the average velocity, which would be, 0.416 m/s


Reynolds Number for the flow is,

Uaverage into D upon nu, that comes out to be, 2080


Hence, the flow is transient.

Slide 8: Solver Type of solver used here is icoFOAM.


It is a Transient Solver.

It is used for incompressible, laminar flow of Newtonian fluid.

Slide 9:

Pressure Boundary Conditions

Pressure Boundary Conditions used,
  • At Inlet: fixedPressure
  • At Outlet: fixedPressure
  • At Walls: ZeroGradient
Slide 10:

Velocity Boundary Conditions

Velocity Boundary Conditions used,
  • At Inlet: pressureInletVelocity
  • At Outlet: zeroGradient
  • At Walls: fixedValue
Show 3dpipe folder.

Show the 3dpipe folder

For executing this case, first let's create the case directory in the 'icoFoam' folder.

And give it some name.

I have named it as '3dpipe'.

Point the mouse pointer from lid driven folder to 3d pipe folder. To know the location of this folder, go through the tutorial on lid driven cavity.

Copy this '0' (zero), 'constant' and 'system' folders of lid driven cavity problem in the newly created folder.

Go inside the 3dpipe folder. Let's go inside the '3dpipe' folder.
Hover the pointer over the folder inside the 3dpipe folder. I have already copied the folders into my '3dpipe' folder and modified the files in it.
Go into the '0' folder and open P file and show it Now, let's go into the '0' folder and open the 'P' file.

This is the pressure boundary condition file.

Show the pressure boundary condition file and show the dimensions inside it. Note that the dimensions are in (meter square) per (second square) (m2/s2).
Show the pressure value written Hence the pressure value in Pascals is divided by the density, that is, 1000 Kg/m3 (Kg per meter cube), and written here.
Close the file Let's close the file.
Open U file in the same folder and show. File containing the velocity boundary condition is as seen.

Let's open the file we can see the velocity boundary condition for inlet, outlet and fixed walls.

Close the file and come out of the '0' folder. Let's close the file and come out of the '0' folder.
Switch back to the slides. To see the blocking strategy, let me switch back to the slides.
Slide 11: Blocking Strategy

Hover the pointer on the geometry and drag it towards the z direction.

To create a 3D geometry of a pipe I have made a 2D circular geometry and extruded the length in z direction.
Point out the numbering pattern. Numbering pattern is as shown. We can also see the dimension of the mesh.
Minimize the slides To see the blockMeshDict file, let's minimize the slides.
Go to folder 'constant' and then 'polyMesh' and open blockMeshDict file and show it. Let's go into the folder 'constant', and then 'polyMesh'.

Let's open theblockMeshDict ' file.

We can see the vertices, blocks,edges and boundaries for inlet, outlet and fixed walls.

Close the file and come out of the folder 'polyMesh Let's close the file and lets come out of the 'polyMesh' folder.
Open and show transportProperties file and point at the value viscosity value We see the 'transportProperties'file. Lets open the file.


Note the dynamic viscosity value, here is 1 into 10 raise to minus 6.

Close the file and come out of the 'constant' folder. Let's close the file and come out of the folder constant.
Go into the system folder and open the controlDict file. Show it. Let's go into the 'system' folder.

Now, let's have a look at the 'controlDict' file.

Show time step value The solution converges after 18 seconds therefore the final time step is kept 19.


The time step has been set to 1 into 10 raise to minus 3.

Close the file and the Home folder. Let's close the file.

Let's close the 'Home' folder.

Press 'Control', 'Alt' and 'T' keys altogether. Now to execute the case, we will first go inside the '3dpipe' folder through terminal.


Let's open the terminal by pressing 'Control', 'Alt' and 'T' key altogether.

Type run and press Enter in the terminal. Type run and press Enter.
Type cd (space) tutorials and press Enter. Type cd (space) tutorials and press Enter.
Type cd (space) incompressible and press Enter Type cd (space) incompressible and press Enter.
Type cd (space) icoFoam and press Enter Type cd (space) icoFoam and press Enter.
Type cd (space) 3dpipe and press Enter Type cd (space) 3dpipe and press Enter.
Type blockMesh and press Enter Now to create the mesh, type blockMesh and press Enter.

Meshing has been done.

After the meshing is done, type icoFoam to start the iterations To start the iterations type icoFoam and press Enter .

We see the iterations are running.

After the iterations are done, type paraFoam for postprocessing the results and press Enter. Iterations has been done.

After the iterations end, type paraFoam for postprocessing the results and press Enter.


It will open the" ParaView". This is " ParaView".

Click on Apply. Let's click on Apply on the left hand side of the Object inspector menu to see the geometry.
Rotate the geometry by pressing the button of the mouse and move it in the required direction. Let's rotate the geometry for a better view.
Click on the active variable control menu and select U in the drop-down menu Click on the active variable control menu and select U in the drop-down menu.
Click on play button At the top, in VCR toolbar, click on Play button.
Go to Object Inspector menu, go to Display, click on Rescale data range Go to Object Inspector menu, go to Display, click on Rescale to data range.
go to the toolbar named common, click on Clips and press Apply To view the half section, go to the toolbar named common, click on Clips.

Go to Object Inspector menu properties and press Apply.

Let's zoom in.

Open the color legend Let's open the color legend.
We can see the maximum velocity is near to the actual maximum velocitythat is 0.40 meters per second.
Go to Filters> Data Analysis> Plot Over Lines To view the graph go to Filters at the top, Data Analysis and press Plot Over Line.
Click on Y axis and press Apply Press Y axis and press Apply.
Point towards the parabolic profile We can see the parabolic profile for Hagen-Poiseuille flow.
Close the graph Let's close the graph.
Close ParaView Let's close ParaView.
Switch to the slides And switch to the slides.
Slide 12: Summary In this tutorial we have learnt:
  • To create and mesh 3D pipe geometry
  • To simulate Hagen-Poiseuille flow for a fixed pressure ratio across boundaries and
  • To visualize the velocity results in Parafoam
Slide 13 : Assignment


As an assignment,

Change the geometry parameters such as length and diameter

Change the corresponding pressure ratio and

Use the fluid of different viscosity

Slide 14: About Spoken tutorials
  • Watch the video available at the following link
  • It summarises the Spoken Tutorial project
  • If you do not have good bandwidth, you can download and watch it
Slide 15: About Spoken tutorials The Spoken Tutorial Project Team
  • Conducts workshops using spoken tutorials
  • Gives certificates for those who pass an online test
  • For more details, please write to contact at spoken hyphen tutorial dot org
Slide 16: Forum to answer questions
  • Do you have questions on THIS Spoken Tutorial?
  • Choose the minute and second where you have the question
  • Explain your question briefly
  • Someone from the FOSSEE team will answer them. Please visit

http://forums.spoken-tutorial.org/

Slide 17: Forum to answer questions
  • Questions not related to the Spoken Tutorial?
  • Do you have general/technical questions on the Software?
  • Please visit the FOSSEE forum

http://forums.fossee.in/

  • Choose the Software and post your question
Slide 18: Lab Migration project
  • We coordinate migration from commercial CFD software like ANSYS to OpenFOAM
  • We conduct free Workshops and provide solutions to CFD Problem Statements in OpenFOAM

For more details visit this site: http://cfd.fossee.in/

Slide 19: Case Study project
  • We invite students to solve a feasible CFD problem statement of reasonable complexity using OpenFOAM
  • We give honorarium and certificate to those who do this

For more details visit this site: http://cfd.fossee.in/

Slide 20: Acknowledgement Spoken Tutorial Project is a part of the Talk to a Teacher project
  • It is supported by the National Mission on Education through ICT, MHRD, Government of India
  • More information on this Mission is available at
  • spoken hyphen tutorial dot org slash NMEICT hyphen Intro

Contributors and Content Editors

DeepaVedartham, Nancyvarkey, P12575, Sneha

Retrieved from "https://script.spoken-tutorial.org/index.php?title=OpenFOAM/C3/Simulating-Hagen-Poiseuille-flow/English&oldid=48858"