Difference between revisions of "OpenFOAM/C2/Simulating-flow-in-a-Lid-Driven-Cavity/English-timed"

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|  00:07
 
|  00:07
 
|  In this tutorial I will show you  
 
|  In this tutorial I will show you  
−
 
  
 
|-
 
|-
 
|  00:09
 
|  00:09
 
|  The''' Lid Driven Cavity''' '''file structure'''
 
|  The''' Lid Driven Cavity''' '''file structure'''
−
 
  
 
|-
 
|-
 
|  00:12
 
|  00:12
 
|  '''Meshing '''the Geometry  
 
|  '''Meshing '''the Geometry  
−
 
  
 
|-
 
|-
 
|  00:14
 
|  00:14
 
|  Solving and '''post-processing results''' in '''Paraview'''
 
|  Solving and '''post-processing results''' in '''Paraview'''
−
 
  
 
|-
 
|-
−
|  00:18
+
|  00:17
 
|  Plotting '''& '''validating''' results on a '''spreadsheet'''.  
 
|  Plotting '''& '''validating''' results on a '''spreadsheet'''.  
  
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|  00:21
 
|  00:21
 
|  To record this tutorial  
 
|  To record this tutorial  
−
 
  
 
|-
 
|-
 
|  00:22
 
|  00:22
 
|  I am using '''Linux Operating system Ubuntu version 10.04''' .  
 
|  I am using '''Linux Operating system Ubuntu version 10.04''' .  
−
 
  
 
|-
 
|-
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|-
 
|-
−
|  00:33
+
|  00:32
 
|  '''Lid driven cavity''' is the most widely used '''2D test'''  
 
|  '''Lid driven cavity''' is the most widely used '''2D test'''  
−
 
  
 
|-
 
|-
Line 59: Line 52:
  
 
|-
 
|-
−
| 00:42
+
| 00:41
 
| The '''boundary''' '''conditions''' remain the same
 
| The '''boundary''' '''conditions''' remain the same
−
 
−
 
  
 
|-
 
|-
Line 69: Line 60:
  
 
|-
 
|-
−
|  00:47
+
|  00:46
 
|  We are '''solving''' this for '''Reynolds no (Re) = 100'''
 
|  We are '''solving''' this for '''Reynolds no (Re) = 100'''
−
 
−
 
  
 
|-
 
|-
Line 88: Line 77:
 
|-
 
|-
 
|  01:02
 
|  01:02
−
|  To do this press '''Ctrl+Alt+t '''simultaneously on your '''keyboard'''
+
|  To do this press '''Ctrl+Alt+t ''' keys simultaneously on your '''keyboard'''
  
 
|-
 
|-
Line 96: Line 85:
 
|-
 
|-
 
| 01:12
 
| 01:12
−
|Now '''type run and press enter'''
+
|Now type '''run''' and press '''enter'''
  
 
|-
 
|-
 
|01:15
 
|01:15
−
|  '''cd '''(space)''' tutorials and Press enter'''
+
|  '''cd '''(space) tutorials''' and Press '''Enter'''
  
 
|-
 
|-
 
| 01:20
 
| 01:20
−
| '''cd '''(space)''' incompressible and Press enter'''
+
| '''cd '''(space)''' incompressible''' and Press '''Enter'''
  
 
|-
 
|-
 
| 01:26  
 
| 01:26  
−
|'''cd '''(space)''' icoFoam '''(Note that F here is capital)''' and Press enter'''
+
|'''cd '''(space)''' icoFoam '''(Note that F here is capital) and Press '''enter'''
  
 
|-
 
|-
 
| 01:33
 
| 01:33
−
|  ''' cd '''(space) cavity and '''Press Enter'''
+
|  ''' cd '''(space) '''cavity and ''' Press '''Enter'''
  
 
|-
 
|-
Line 132: Line 121:
 
|-
 
|-
 
|01:55
 
|01:55
−
|  The '''constant folder '''contains another '''folder''' named '''polymesh''' '''and a file describing the physical properties of fluid.'''
+
|  The '''constant folder '''contains another '''folder''' named '''polymesh''' and a file describing the physical properties of fluid.
  
 
|-
 
|-
−
| 02:02
+
| 02:01
−
| Now type '''cd (space) polymesh''' and '''Press Enter'''
+
| Now type '''cd (space) polymesh''' and Press '''Enter'''
−
 
+
−
 
+
  
 
|-
 
|-
 
| 02:08
 
| 02:08
−
| '''Polymesh contains a file named blockMeshDict '''
+
| '''Polymesh''' contains a file named '''blockMeshDict '''
  
 
|-
 
|-
 
| 02:12
 
| 02:12
−
|  Now type '''ls''' and press enter
+
|  Now type '''ls''' and press '''Enter'''
  
 
|-
 
|-
Line 154: Line 141:
 
|-
 
|-
 
|  02:17
 
|  02:17
−
| To open up the  '''blockMeshDict'''file  type '''gedit blockMeshDict'''
+
| To open up the  '''blockMeshDict''' file  type '''gedit space blockMeshDict'''
  
 +
(Note that M and D  here are capital)
  
−
'''(Note '''that''' M and D '''here are''' capital)'''
+
Now press '''enter'''
−
 
+
−
 
+
−
Now press enter
+
  
 
|-
 
|-
Line 170: Line 155:
 
|-
 
|-
 
| 02:32
 
| 02:32
−
| '''Let me drag this to the capture area'''
+
| Let me drag this to the capture area
  
 
|-
 
|-
 
|  02:36
 
|  02:36
−
|  This contains : '''cordinates for lid driven cavity'''
+
|  This contains : cordinates for '''lid driven cavity'''
  
 
|-
 
|-
 
|  02:41
 
|  02:41
−
|'''blocking and meshing parameters'''
+
|'''blocking''' and '''meshing parameters'''
  
 
|-
 
|-
 
|  02:44
 
|  02:44
−
|'''and boundary patches.'''
+
|and '''boundary patches.'''
  
 
|-
 
|-
 
|  02:47
 
|  02:47
−
|  | Since there are  no '''arcs''' as well as no '''patches''' to be''' merged'''
+
| Since there are  no '''arcs''' as well as no '''patches''' to be''' merged''', '''edges''' and '''mergePatchPairs''' can be kept empty
−
 
+
−
 
+
  
 
|-
 
|-
−
| 02:51
+
| 02:56
−
| '''edges and mergePatchPairs can be kept empty'''
+
−
 
+
−
|-
+
−
| 02:57
+
 
| Now close this
 
| Now close this
  
 
|-
 
|-
 
|  02:58
 
|  02:58
−
| | In the '''command terminal''' type : '''cd (space) .. (dot) (dot)'''  and press enter.
+
| In the '''command terminal''' type : '''cd (space) .. (dot) (dot)'''  and press '''enter.'''
  
 
|-
 
|-
 
| 03:04
 
| 03:04
−
| Do  this twice. you will come back to the''' cavity folder'''
+
| Do  this twice. You will come back to the''' cavity folder'''
  
 
|-
 
|-
 
| 03:09
 
| 03:09
−
|  Now type '''cd''' (space) '''system''' and press enter,
+
|  Now type '''cd''' (space) '''system''' and press '''enter,'''
  
 
|-
 
|-
−
|03:16
+
|03:15
−
|  Now type '''ls''' press enter  this contains three '''files'''  
+
|  Now type '''ls''' press '''Enter''' this contains three files
−
 
+
  
 
|-
 
|-
 
|  03:22
 
|  03:22
−
|'''controlDict, fvSchemes and fvSolutions'''
+
|'''controlDict, fvSchemes''' and '''fvSolutions'''
  
 
|-
 
|-
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|  03:30
 
|  03:30
 
|'''fvSolution''' contains '''discritization schemes''' used in '''run time'''.
 
|'''fvSolution''' contains '''discritization schemes''' used in '''run time'''.
−
 
  
 
|-
 
|-
 
|  03:35
 
|  03:35
−
|And'''fvSchemes''' contains equation for '''solver''',
+
|And '''fvSchemes''' contains equation for '''solver''', '''tolerance''' etc.  
−
 
+
−
 
+
−
|-
+
−
|  03:38
+
−
|'''tolerance''' etc.  
+
  
 
|-
 
|-
 
| 03:40
 
| 03:40
−
| Now again type '''cd (space) (dot dot) . . '''and press enter
+
| Now again type '''cd (space) (dot dot) . . '''and press '''Enter'''
  
 
|-
 
|-
−
| 03:47
+
| 03:46
−
|  Now type '''cd ( space )''' 0 (zero) and Press enter
+
|  Now type '''cd ( space )''' 0 (zero) and Press '''Enter'''
  
 
|-
 
|-
 
|03:53
 
|03:53
−
| Now type''' ls''' and press enter
+
| Now type''' ls''' and press '''Enter'''
  
 
|-
 
|-
 
| 03:57
 
| 03:57
−
|  This contains the '''initial values''' for '''boundary conditions''' like  
+
|  This contains the '''initial values''' for '''boundary conditions''' like '''Pressure ,Velocity,Temperature etc.'''  
−
 
+
−
 
+
−
|-
+
−
|  04:00
+
−
|'''Pressure ,Velocity,Temperature etc.'''  
+
  
 
|-
 
|-
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| 04:09
 
| 04:09
 
|  Now we need to '''mesh '''the''' geometry'''
 
|  Now we need to '''mesh '''the''' geometry'''
−
 
  
 
|-
 
|-
 
|  04:11
 
|  04:11
−
|'''We are using a course mesh here.'''
+
|We are using a course mesh here.
  
 
|-
 
|-
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|-
 
|-
 
|04:18  
 
|04:18  
−
| Now type '''blockMesh '''(Note that M  here is capital) and press enter
+
| Now type '''blockMesh '''(Note that M  here is capital) and press '''Enter'''
  
 
|-
 
|-
 
| 04:25
 
| 04:25
−
|  The'''Meshing''' is done.
+
|  The '''Meshing''' is done.
  
 
|-
 
|-
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|  04:31
 
|  04:31
 
|  To view the '''geometry'''  
 
|  To view the '''geometry'''  
−
 
  
 
|-
 
|-
 
|  04:32
 
|  04:32
−
|Type '''paraFoam''' , Note that '''F''' here is '''capital''' and '''press enter'''
+
|Type '''paraFoam''' , Note that '''F''' here is '''capital''' and press '''Enter'''
  
 
|-
 
|-
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|04:58
 
|04:58
 
|  Check the mesh by typing '''checkMesh''' in the''' terminal'''
 
|  Check the mesh by typing '''checkMesh''' in the''' terminal'''
−
 
  
 
|-
 
|-
 
|  05:04
 
|  05:04
−
|Note that '''M''' here is capital and press enter
+
|Note that '''M''' here is capital and press '''Enter'''
  
 
|-
 
|-
 
|05:08
 
|05:08
−
| you can see  the '''number of cells''' ,
+
| you can see  the number of cells, '''skewness''' and other parameters, which are associated with the '''mesh'''
−
 
+
−
 
+
−
|-
+
−
|  05:10
+
−
|'''skewness''' and '''other parameters'''
+
−
 
+
−
 
+
−
|-
+
−
|  05:12
+
−
|which are associated with the '''mesh'''
+
  
 
|-
 
|-
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|-
 
|-
−
|  05:18
+
|  05:17
 
|  The solver we are using here is '''icoFoam''' :
 
|  The solver we are using here is '''icoFoam''' :
  
 
|-
 
|-
 
|  05:20
 
|  05:20
−
| | '''icoFoam is a Transient''' '''solver''' for '''incompressible flow''' of '''newtonian fluids'''
+
|   '''icoFoam is a Transient''' '''solver''' for '''incompressible flow''' of '''newtonian fluids'''
  
 
|-
 
|-
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|  05:29
 
|  05:29
 
|  In the '''terminal '''type '''icoFoam'''  
 
|  In the '''terminal '''type '''icoFoam'''  
−
 
  
 
|-
 
|-
 
|  05:33
 
|  05:33
−
|Note that '''F''' here is '''capital''' and press enter
+
|Note that '''F''' here is '''capital''' and press '''Enter'''
  
 
|-
 
|-
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|-
 
|-
 
| 05:40
 
| 05:40
−
| After the solving is done type '''paraFoam''' in the terminal  
+
| After the solving is done type '''paraFoam''' in the terminal to view the '''geometry''' and the '''results'''
−
 
+
−
|-
+
−
|  05:44
+
−
|to view the '''geometry''' and the '''results'''
+
  
 
|-
 
|-
 
| 05:54
 
| 05:54
 
|  On the left hand side of '''object inspector menu'''
 
|  On the left hand side of '''object inspector menu'''
−
 
  
 
|-
 
|-
 
|  05:57
 
|  05:57
−
|'''click on Apply'''
+
|click on '''Apply'''
  
 
|-
 
|-
−
|  05:59
+
|  05:58
 
|  Now '''Scroll''' down the '''properties '''  on '''objector inspector menu '''
 
|  Now '''Scroll''' down the '''properties '''  on '''objector inspector menu '''
  
Line 385: Line 333:
 
|-
 
|-
 
|  06:02
 
|  06:02
−
|'''you can see mesh part,volume fields etc'''
+
|you can see '''mesh parts,volume fields etc'''
  
 
|-
 
|-
 
| 06:07
 
| 06:07
−
|  '''Check or uncheck '''these '''boxes''' in the '''mesh''' part
+
|  '''Check or uncheck '''these '''boxes''' in the '''mesh''' part, to view the '''different boundary''' '''regions '''of '''Lid driven cavity'''
−
 
+
−
 
+
−
|-
+
−
|  06:11
+
−
|to view the '''different boundary''' '''regions '''of '''Lid driven cavity'''
+
  
 
|-
 
|-
 
|  06:15  
 
|  06:15  
−
|  Now after this on top of the left-hand side''' on  active variable control '''
+
|  Now after this on top of the left-hand side on  '''active variable control ''', dropdown menu change this from solid color to p or capital   U, which are the '''initial conditions''' such as '''pressure , velocity'''
−
 
+
−
 
+
−
|-
+
−
|  06:21
+
−
|'''dropdown menu change this from solid color to p orcapital   U'''
+
−
 
+
−
 
+
−
|-
+
−
|  06:26
+
−
|which are the '''initial conditions''' such as '''pressure , velocity'''
+
−
 
+
  
 
|-
 
|-
 
|  06:31
 
|  06:31
−
|'''I will select capital U'''. Now this will show you'' the initial condition of velocity
+
|I will select capital U. Now this will show you the initial condition of velocity  
  
 
|-
 
|-
 
|  06:37
 
|  06:37
−
|  on top of the''' paraview window''' you can see the''' VCR control'''
+
|  On top of the''' paraview window''' you can see the''' VCR control'''
−
 
+
  
 
|-
 
|-
 
|  06:44
 
|  06:44
−
|'''Click on the play button'''
+
|Click on the play button
  
 
|-
 
|-
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|-
 
|-
 
|  07:09
 
|  07:09
−
|To do this let us '''plot''' the '''U and V velocity'''
+
|To do this let us '''plot''' the '''U''' and '''V velocity'''
  
 
   
 
   
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| 07:25
 
| 07:25
 
|  Select the '''X & Y axis''' turn by turn.
 
|  Select the '''X & Y axis''' turn by turn.
−
 
  
 
|-
 
|-
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|-
 
|-
 
| 07:37
 
| 07:37
−
|  You can see '''Pressure and velocity''' '''plots''' being plotted
+
|  You can see '''Pressure''' and '''velocity''' '''plots''' being plotted
  
 
|-
 
|-
 
| 07:42
 
| 07:42
−
|  Since it is a '''non dimensional analysis'''
+
|  Since it is a '''non dimensional analysis''', we need to '''plot the graph''' for '''u/U v/s y/L''' for '''Reynolds number =100'''
−
 
+
−
 
+
−
|-
+
−
|  07:44
+
−
|we need to '''plot the graph''' for '''u/U v/s y/L''' for '''Reynolds number =100'''
+
  
 
|-
 
|-
 
| 07:52
 
| 07:52
−
|  | To do this in '''Plot Data''' click on the '''Y-axis'''
+
|  To do this in '''Plot Data''' click on the '''Y-axis'''
−
 
+
  
 
|-
 
|-
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| 08:01
 
| 08:01
 
|  You can see the''' plot'''
 
|  You can see the''' plot'''
−
 
  
 
|-
 
|-
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|-
 
|-
 
| 08:09
 
| 08:09
−
| Give   appropriate name to your file
+
| Give   appropriate name to your file
  
 
|-
 
|-
 
|  08:11
 
|  08:11
 
|  I will give this as '''cavity'''
 
|  I will give this as '''cavity'''
−
 
  
 
|-
 
|-
Line 518: Line 440:
 
| 08:23
 
| 08:23
 
|  Now go to the '''cavity folder''' of '''openfoam directory'''.
 
|  Now go to the '''cavity folder''' of '''openfoam directory'''.
−
 
  
 
|-
 
|-
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|  08:39
 
|  08:39
 
| In the libreoffice spreadsheet copy the U0 (u velocity) and to the right point 1(Y-axis) columns
 
| In the libreoffice spreadsheet copy the U0 (u velocity) and to the right point 1(Y-axis) columns
−
 
+
in another spreadsheet  
−
 
+
−
|-
+
−
| 08:46
+
−
|in another spreadsheet  
+
  
 
|-
 
|-
 
|  08:48
 
|  08:48
−
|  Now divide both these coloumns
+
|  Now divide both these coloumns that is '''u zero''' by '''capital U''' and '''points 1''' by '''capital L'''
−
 
+
−
 
+
−
|-
+
−
|  08:52
+
−
|that is '''u zero''' by '''capital U''' and '''points 1''' by '''capital L'''
+
  
 
|-
 
|-
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|-
 
|-
 
|  09:08
 
|  09:08
−
| | Now let me switch back to the slides
+
| Now let me switch back to the slides
  
 
|-
 
|-
−
|  09:11
+
|  09:10
 
| Results obtained will be similar to this figure
 
| Results obtained will be similar to this figure
  
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| 09:16
 
| 09:16
 
| '''Validate''' the result on a  paper published on '''Lid Driven Cavity by : Ghia et al. (1982''') and  
 
| '''Validate''' the result on a  paper published on '''Lid Driven Cavity by : Ghia et al. (1982''') and  
−
 
+
Results '''obtained from Fluent'''
−
 
+
−
|-
+
−
|  09:22
+
−
|Results '''obtained from Fluent'''
+
  
 
|-
 
|-
Line 573: Line 481:
 
|-
 
|-
 
|  09:26
 
|  09:26
−
|'''File structure of Lid Driven cavity'''
+
|File structure of '''Lid Driven cavity'''
  
 
|-
 
|-
Line 585: Line 493:
 
|-
 
|-
 
|  09:32
 
|  09:32
−
|And'''Validation'''
+
|And '''Validation'''
  
 
|-
 
|-
Line 600: Line 508:
 
|-
 
|-
 
|  09:41
 
|  09:41
−
|* '''Kinematic viscosity in transportPorpoerties in constant folder'''
+
|* '''Kinematic viscosity'''  in '''transportPorpoerties''' in constant folder
  
 
|-
 
|-
 
|  09:45
 
|  09:45
 
|And Plot results of '''u/U and y/L'''
 
|And Plot results of '''u/U and y/L'''
−
 
−
 
  
 
|-
 
|-

Revision as of 17:49, 23 October 2015

Time Narration
00:01 Hello and welcome to the spoken tutorial on Simulating Flow in a Lid Driven Cavity using openfoam
00:07 In this tutorial I will show you
00:09 The Lid Driven Cavity file structure
00:12 Meshing the Geometry
00:14 Solving and post-processing results in Paraview
00:17 Plotting & validating results on a spreadsheet.
00:21 To record this tutorial
00:22 I am using Linux Operating system Ubuntu version 10.04 .
00:27 OpenFOAM version 2.1.0 ParaView version 3.12.0
00:32 Lid driven cavity is the most widely used 2D test
00:36 case for validation of a CFD code
00:39 This is diagram of Lid Driven Cavity
00:41 The boundary conditions remain the same
00:44 A moving wall and three fixedwalls
00:46 We are solving this for Reynolds no (Re) = 100
00:50 The moving wall has a velocity of 1 meters per second
00:54 The path for the Lid Driven Cavity is the same as discussed in the installation tutorial
01:00 Now Open a command terminal
01:02 To do this press Ctrl+Alt+t keys simultaneously on your keyboard
01:08 In the command terminal type the path for lid driven cavity
01:12 Now type run and press enter
01:15 cd (space) tutorials and Press Enter
01:20 cd (space) incompressible and Press Enter
01:26 cd (space) icoFoam (Note that F here is capital) and Press enter
01:33 cd (space) cavity and Press Enter
01:38 Now type ls and press enter
01:41 In the file structure of cavity you will see 3 folders : 0 , constant , and system
01:46 Now type cd (space) constant and press enter
01:52 Now type ls and press enter
01:55 The constant folder contains another folder named polymesh and a file describing the physical properties of fluid.
02:01 Now type cd (space) polymesh and Press Enter
02:08 Polymesh contains a file named blockMeshDict
02:12 Now type ls and press Enter
02:15 You can see the blockMeshDict
02:17 To open up the blockMeshDict file type gedit space blockMeshDict

(Note that M and D here are capital)

Now press enter

02:30 This will Open up the blockMeshDict file


02:32 Let me drag this to the capture area
02:36 This contains : cordinates for lid driven cavity
02:41 blocking and meshing parameters
02:44 and boundary patches.
02:47 Since there are no arcs as well as no patches to be merged, edges and mergePatchPairs can be kept empty
02:56 Now close this
02:58 In the command terminal type : cd (space) .. (dot) (dot) and press enter.
03:04 Do this twice. You will come back to the cavity folder
03:09 Now type cd (space) system and press enter,
03:15 Now type ls press Enter this contains three files
03:22 controlDict, fvSchemes and fvSolutions
03:26 controlDict contains control parameters for start/end time.


03:30 fvSolution contains discritization schemes used in run time.
03:35 And fvSchemes contains equation for solver, tolerance etc.
03:40 Now again type cd (space) (dot dot) . . and press Enter
03:46 Now type cd ( space ) 0 (zero) and Press Enter
03:53 Now type ls and press Enter
03:57 This contains the initial values for boundary conditions like Pressure ,Velocity,Temperature etc.
04:03 Now Type cd ( space ) (dot dot) . . to return back to the cavity folder
04:09 Now we need to mesh the geometry
04:11 We are using a course mesh here.
04:14 Mesh the geometry by typing blockMesh in the terminal.
04:18 Now type blockMesh (Note that M here is capital) and press Enter
04:25 The Meshing is done.
04:27 If there is some error in the blockMesh file it will be shown in the terminal
04:31 To view the geometry
04:32 Type paraFoam , Note that F here is capital and press Enter
04:40 This will open the paraview window
04:44 Now on the left hand side of the object inspector menu click on Apply.
04:49 You can see the lid driven cavity geometry now close this
04:58 Check the mesh by typing checkMesh in the terminal
05:04 Note that M here is capital and press Enter
05:08 you can see the number of cells, skewness and other parameters, which are associated with the mesh
05:15 Let me switch back to the slides.
05:17 The solver we are using here is icoFoam :
05:20 icoFoam is a Transient solver for incompressible flow of newtonian fluids
05:26 Let me switch back to the terminal
05:29 In the terminal type icoFoam
05:33 Note that F here is capital and press Enter
05:37 The Iterations running will be seen in the terminal window.
05:40 After the solving is done type paraFoam in the terminal to view the geometry and the results
05:54 On the left hand side of object inspector menu
05:57 click on Apply
05:58 Now Scroll down the properties on objector inspector menu


06:02 you can see mesh parts,volume fields etc
06:07 Check or uncheck these boxes in the mesh part, to view the different boundary regions of Lid driven cavity
06:15 Now after this on top of the left-hand side on active variable control , dropdown menu change this from solid color to p or capital U, which are the initial conditions such as pressure , velocity
06:31 I will select capital U. Now this will show you the initial condition of velocity
06:37 On top of the paraview window you can see the VCR control
06:44 Click on the play button
06:47 Now this is the final result of velocity for lid driven cavity
06:52 Toggle on the color legend by clicking on the top left of the active variable control menu
07:03 This is the color legend for U velocity
07:07 We need to validate the results obtained


07:09 To do this let us plot the U and V velocity


07:12 To do this Go to Filters scroll down > Data Analysis > Plot Over line
07:21 Click on it
07:23 You can see X , Y and Z axis
07:25 Select the X & Y axis turn by turn.
07:31 I will select the X axis and click Apply
07:37 You can see Pressure and velocity plots being plotted
07:42 Since it is a non dimensional analysis, we need to plot the graph for u/U v/s y/L for Reynolds number =100
07:52 To do this in Plot Data click on the Y-axis
07:58 And click APPLY
08:01 You can see the plot
08:03 Now in menu bar go to File > Save Data
08:09 Give appropriate name to your file
08:11 I will give this as cavity
08:15 The file will be saved as .csv file
08:19 Now click ok. Again click ok
08:23 Now go to the cavity folder of openfoam directory.
08:29 Scroll down you can see the cavity.csv file
08:34 Open it in Open office or LibreOffice Spreadsheet
08:39 In the libreoffice spreadsheet copy the U0 (u velocity) and to the right point 1(Y-axis) columns

in another spreadsheet

08:48 Now divide both these coloumns that is u zero by capital U and points 1 by capital L
08:59 And Plot the results in libreoffice charts option on top in the menu bar.
09:08 Now let me switch back to the slides
09:10 Results obtained will be similar to this figure
09:16 Validate the result on a paper published on Lid Driven Cavity by : Ghia et al. (1982) and

Results obtained from Fluent

09:24 In this tutorial we learnt
09:26 File structure of Lid Driven cavity
09:28 Solved lid driven cavity.
09:30 Post-processing of solutions
09:32 And Validation
09:34 As as Assignment,
09:35 Change some parameters in the lid driven cavity
09:38 * Velocity Magnitude in the 0 folder
09:41 * Kinematic viscosity in transportPorpoerties in constant folder
09:45 And Plot results of u/U and y/L
09:50 Watch the video available at this URL: http://spoken-tutorial.org/What_is_a_Spoken_Tutorial
09:54 It summarizes the Spoken Tutorial project.
09:57 If you do not have good bandwidth, you can download and watch it.
10:00 The Spoken Tutorial Project Team
10:02 Conducts workshops using spoken tutorials
10:05 Gives certificates to those who pass an online test
10:09 For more details, please write to us at contact @spoken-tutorial.org
10:15 Spoken Tutorials are part of Talk to a Teacher project,
10:18 It is supported by the National Mission on Education through ICT, MHRD, Government of India.
10:23 More information on the same is available at the following URL link http://spoken-tutorial.org/NMEICT-Intro
10:27 This is Rahul Joshi from IIT BOMBAY signing off.
10:30 Thanks for joining

Contributors and Content Editors

DeepaVedartham, Gaurav, Nancyvarkey, PoojaMoolya, Sandhya.np14, Sneha

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