Difference between revisions of "OpenFOAM/C3/Turbulent-Flow-in-a-Lid-driven-Cavity/English"
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1: | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1: | ||
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| 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 modelling '''Turbulent flow in a Lid Driven Cavity using 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 modelling '''Turbulent flow in a Lid Driven Cavity using OpenFOAM''' | ||
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| 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 I will show you | | 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 I will show you | ||
− | + | * Solving '''turbulent case''' in '''OpenFOAM''' and | |
− | Solving '''turbulent | + | * Plotting '''streamlines''' in '''ParaView''' |
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− | Plotting '''streamlines''' in ''' | + | |
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System Requirement | System Requirement | ||
− | | 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 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 I am using |
+ | * '''Linux operating system''' '''Ubuntu version 12.04''' | ||
+ | * '''OpenFoam version 2.1.1''' and | ||
+ | * '''ParaView version 3.12.0''' | ||
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+ | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4: | ||
− | + | System Requirement | |
− | + | * The tutorials were recorded using the versions specified in previous slide | |
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+ | * Subsequently the tutorials were edited to latest versions | ||
+ | * To install latest system requirements go to Installation Sheet | ||
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− | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide | + | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 5 : |
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| 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 you should have some basic knowledge of | | 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 you should have some basic knowledge of | ||
− | + | * '''Turbulence modelling''' | |
− | '''Turbulence modelling''' | + | * Knowledge of how to solve '''flow''' in a '''Lid driven cavity''' |
− | + | * If not so please refer to the relevant tutorial on our website | |
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− | Knowledge of how to solve flow in a '''Lid driven cavity''' | + | |
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− | If not so please refer to the | + | |
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− | | 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;"| This problem is identical in '''geometry and boundary | + | | 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;"| This problem is identical in '''geometry and boundary condition''' to the ''''Lid Driven Cavity'''' problem discussed in the basic level tutorial |
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− | basic level tutorial | + | |
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− | '''pisoFoam solver''' in OpenFoam directory | + | Please make a note this problem is already set up in '''pisoFoam solver''' in '''OpenFoam''' directory |
− | The '''boundary conditions''' are | + | The '''boundary conditions''' are the '''Lid velocity U is 1 m/s''' |
− | And we are solving this for a '''Reynolds number | + | And we are solving this for a '''Reynolds number Re equal to 10000''' |
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− | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide | + | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6: Solver |
− | | 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 | + | | 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 are using a '''Transient solver''' for '''incompressible turbulent flow of Newtonian fluids''' called as '''pisoFoam''' |
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Steps in setting up the problem | ||
− | | 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 | + | | 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 us open the '''Terminal''' window by pressing '''Ctrl+Atl+T''' keys together |
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the terminal window | ||
+ | Type cd 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;"| In the '''terminal''' window type '''run''' 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;"| In the terminal | + | |
− | Now type '''cd tutorials''' and press | + | Now 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 incompressible | ||
+ | | 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 type '''cd space incompressible''' and press '''Enter''' | ||
− | type '''cd | + | |- |
+ | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd pisoFoam | ||
+ | | 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 type '''cd space pisoFoam''' (Note that '''F''' here is capital ) and press '''Enter''' | ||
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+ | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type ls | ||
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− | + | Two Folders les and ras | |
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Cavity folder inside RAS | Cavity folder inside RAS | ||
− | | 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 type''' ls''' and press | + | | 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 type''' ls''' and press '''Enter''' |
− | In this you will see two folders '''les and ras''' | + | In this you will see two folders '''les''' and '''ras''' |
− | Our problem | + | Our problem setup is inside '''ras''' folder which is called as '''reynolds averaged stress''' |
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+ | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd ras | ||
+ | ls | ||
+ | | 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;"| Our folder name is '''cavity''' | ||
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+ | Now type '''cd space ras''' and press '''Enter''' | ||
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+ | Now type''' ls''' and press '''Enter''' | ||
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− | + | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd cavity | |
− | You can see the '''cavity''' folder | + | ls |
+ | | 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;"| You can see the '''cavity''' folder. Let me clear this off | ||
− | type '''cd cavity''' and press | + | Now type '''cd space cavity''' and press '''Enter''' |
− | Now type''' ls''' and press | + | Now type''' ls''' and press '''Enter''' |
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− | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Boundary and Initial conditions | + | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the 3 folders |
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+ | Boundary and Initial conditions | ||
0 folder | 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;"| | + | | 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;"| You can see three folders ''' 0, constant''' and '''system''' |
− | The '''initial conditions''' are specified within the files in the ''''0'''' directory | + | The '''initial conditions''' are specified within the files in the ''''0'''' directory |
− | + | Now let us take a look at the files in the ''''0'''' directory | |
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− | ls | + | Type ls |
+ | | 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 do this, in the '''command terminal''' type '''cd space 0''' and press '''Enter''' | ||
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+ | Now type '''ls''' 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;"|Point to the files as per narration | ||
+ | | 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;"| You can see the files named as '''epsilon, k, nut, nutilda, p, R''' and '''U''' | ||
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+ | These files are to be kept as default until the '''inlet parameters''' don't change | ||
+ | If any changes are to be done please refer to the tutorial on '''Simulating flow in a channel''' using OpenFoam, to calculate these values | ||
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− | | 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:none;padding:0.097cm;"| Type cd.. |
− | | 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 type '''cd | + | | 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 type '''cd space dot dot''' and press '''Enter''' |
Let me clear this off | Let me clear this off | ||
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+ | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd constant | ||
− | Let us open the '''constant''' folder | + | Type ls |
+ | | 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 us open the '''constant''' folder | ||
− | To do this type '''cd constant''' and press | + | To do this type '''cd space constant''' and press '''Enter''' |
− | Now type '''ls''' and press | + | Now type '''ls''' and press '''Enter''' |
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| PolyMesh folder and fluid property files | ||
+ | | 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 you will see the '''polyMesh''' folder containing | ||
+ | *the geometry of the '''case''' inside '''blockMeshDict''' | ||
+ | *and the '''fluid properties''' | ||
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− | | 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 | + | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the two files as per narration |
− | + | | 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 '''case''' you will see two more files other than '''transportProperties''' named as '''RASProperties''' and''' turbulenceProperties''' | |
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− | other than '''transportProperties''' named as | + | |
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− | '''RASProperties''' and''' turbulenceProperties''' | + | |
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| RASProperties | ||
− | | 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 the terminal type''' gedit (space) RASProperties''' and press | + | | 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 the '''terminal''' type''' gedit (space) RASProperties''' and press '''Enter''' |
− | + | Scroll down | |
− | + | '''RASProperties''' contain the '''Reynolds average stress model''' for this case, which is kept as '''kEpsilon''' | |
− | + | Close this | |
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| turbulentProperties | ||
− | | 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 in the command 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;"| Now in the '''command terminal''', type '''gedit space turbulentproperties''' and press '''Enter''' |
− | + | Scroll down | |
− | ''' | + | '''The simulation type model''' for this '''case''' is kept as '''RASModel''' |
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− | ''' | + | |
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Change the value of viscosity | Change the value of viscosity | ||
− | | 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 us open the '''transportProperties''' | + | | 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 us open the '''transportProperties model''' |
− | + | To do this, in the '''terminal''' type '''gedit space transportProperties '''and press '''Enter''' | |
− | The '''transportModel '''we are using here is '''Newtonian '''and | + | The '''transportModel '''we are using here is '''Newtonian '''and the '''Viscosity''' is kept as '''1 e raise to -4''' |
− | + | Close this | |
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− | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do | + | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Do not change the blockMeshDict file |
The system folder is to be kept default | The system folder is to be kept default | ||
− | | 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 are not changing the geometry in this case | + | | 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 are not changing the '''geometry''' in this '''case''' |
− | So we need not go inside the '''polyMesh '''folder | + | So we need not go inside the '''polyMesh '''folder and look at the '''blockMeshDict''' file |
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− | and look at the '''blockMeshDict''' file | + | |
It can be kept as it is | It can be kept as it is | ||
+ | |- | ||
+ | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Type cd.. | ||
+ | | 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 the '''terminal''' type '''cd space dot dot''' and press '''Enter''' | ||
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− | + | We will keep the '''system''' folder default as there are no changes inside it | |
− | We will keep the '''system''' folder default | + | |
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Meshing is done | Meshing is done | ||
− | | 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;"| | + | | 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, we are done with the setup |
− | + | We can '''mesh''' the '''geometry''' | |
− | To do this in the | + | To do this in the '''terminal''' window '''type blockMesh''' and press '''Enter''' |
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Running the solver : pisoFoam | ||
− | | 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 we can run the '''solver''' | + | | 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 we can '''run''' the '''solver''' |
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+ | To do this in the '''terminal''' type '''pisoFoam''' and press '''Enter''' | ||
− | + | The '''iterations''' running can be seen in the '''terminal''' window | |
− | It may take some time | + | It may take some time for the '''iterations''' to stop |
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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in paraview | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Post-processing the results in 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;"| ''' | + | | 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 '''iterations''' running will stop at the end of the '''time step''' |
− | To visualize the results let us open the ''' | + | To visualize the results let us open the '''ParaView''' window |
− | To do this in the terminal '''type paraFoam''' and press | + | To do this in the '''terminal''' type '''paraFoam''' and press '''Enter''' |
− | This will open the ''' | + | This will open the '''ParaView''' window |
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− | You can see the '''lid driven cavity''' | + | You can see the '''lid driven cavity geometry''' |
− | A common | + | A common visualization is '''surface plots''' |
− | Change the display to '''Surface''' in the column | + | Change the display to '''Surface''' in the column. |
+ | And from the drop down menu change from '''solid colour''' to capital '''U''' | ||
− | |||
− | + | You can see the '''initial condition''' of '''velocity''' | |
− | You can see the initial condition of velocity | + | |
|- | |- | ||
Line 425: | Line 352: | ||
Toggle on the color legend | Toggle on 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;"| Now on top of the | + | | 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 on the top of the '''ParaView''' window you can see the '''VCR control''' |
− | Click the ''' | + | Click on the '''Play''' button |
− | You can see the motion of the fluid inside the '''cavity''' | + | You can see the motion of the fluid inside the '''cavity''' |
− | You can also '''toggle | + | You can also '''toggle''' on the '''colour legend''' from the left hand side top of '''ParaView active variable control menu''' |
− | + | Click on it. You can see the colour '''legend''' | |
− | + | ||
− | + | ||
− | + | ||
|- | |- | ||
Line 450: | Line 374: | ||
− | | 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;"| | + | | 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 visualise the '''stream lines''' |
+ | *On top of the menu bar of '''ParaView''' | ||
+ | *Go to '''Filters > Common and Stream Tracer''' | ||
+ | *Click on it | ||
− | On the | + | |- |
+ | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines on top | ||
+ | | 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;"| On the left hand side of the '''Object inspector menu''' you can see '''Apply'''. Click on it | ||
− | + | You can see the '''stream lines''' at the centre of the '''lid driven cavity''' | |
− | + | ||
− | + | ||
− | + | ||
|- | |- | ||
− | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines | + | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Streamlines view |
− | | 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;"| | + | | 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;"| You can also change the '''orientation''' in which the '''stream lines''' are viewed |
− | + | To do this , scroll down | |
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | + | ||
− | To do this , scroll down | + | |
You can see the''' seed type''' | You can see the''' seed type''' | ||
− | + | |- | |
− | Let me shift this to the right | + | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Shift to right >> change point source to line source |
− | + | | 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 me shift this to the right and change from''' point source''' to '''line source''' | |
− | + | ||
− | and change | + | |
|- | |- | ||
Line 489: | Line 407: | ||
Click on the Y axis | Click on the Y axis | ||
+ | Click on the X axis | ||
+ | Delete this | ||
− | | 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;"| You can see the X, Y and Z | + | | 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;"| You can see the '''X, Y''' and '''Z axes''' which are visible |
− | + | Select any of these axis in which you would like to view the '''stream lines''' | |
− | + | ||
− | + | ||
− | in which you would like to view the '''stream lines''' | + | |
Line 503: | Line 420: | ||
− | You can see the '''streamlines''' along the Y axis | + | You can see the '''streamlines''' along the Y axis |
− | + | ||
− | + | ||
− | + | ||
− | '''plot streamlines''' along the X axis | + | Similarly you can select the '''X axis''' and plot the '''streamlines''' along the '''X axis''' |
Line 519: | Line 433: | ||
Save as .csv format | Save as .csv format | ||
− | | 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;"| You can also plot the velocity along | + | | 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;"| You can also plot the '''velocity''' along '''X''' and '''Y''' axis using '''plot over line''' |
− | To do this go to ''' | + | To do this go to '''Filters > Data Analysis and Plot over line''' |
− | Save the data as''' | + | Save the data as''' dot csv''' from the '''File''' menu |
− | Click on ''' | + | Click on '''Save Data''' |
|- | |- | ||
Line 534: | Line 448: | ||
For Re= 10000 | For Re= 10000 | ||
− | | 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;"| You can plot this data in ''' | + | | 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;"| You can plot this data in '''LibreOffice spreadsheet '''or any other '''plotting''' software of your choice |
Now let me switch back to the slides | Now let me switch back to the slides | ||
− | The results obtained can be '''validated''' by results | + | The results obtained can be '''validated''' by using results of '''Ghia et.al for Reynolds Number, Re equal to 10000''' |
|- | |- | ||
− | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide : | + | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 7: |
Summary | 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;"| | + | | 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;"| That's all we have in this tutorial |
− | Let us summarise | + | Let us summarise. |
− | + | *'''Turbulent Flow in a Lid Driven Cavity''' | |
− | + | *and plotting '''stream lines '''in''' ParaView''' | |
− | + | ||
− | + | ||
This brings us to the end of the tutorial | 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 : Assignment | + | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8: 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 | | 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 | ||
− | Modify the '''grid size''' of the cavity | + | * Modify the '''grid size''' of the '''cavity''' |
− | Change it to | + | * Change it to 100 100 1 |
− | + | * And visualise the results in '''ParaView''' using '''streamlines''' | |
|- | |- | ||
| 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: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;"| | + | | 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 this URL: | ||
http://spoken-tutorial.org/What_is_a_Spoken_Tutorial | http://spoken-tutorial.org/What_is_a_Spoken_Tutorial | ||
− | It summarizes the Spoken Tutorial project | + | * It summarizes 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 |
|- | |- | ||
Line 582: | Line 495: | ||
-Gives certificates to those who pass an online test | -Gives certificates to those who pass an online test | ||
− | -For more details | + | -For more details please write to |
− | contact | + | contact at the rate spoken hyphen tutorial dot org |
|- | |- | ||
− | | 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:none;padding:0.097cm;"| Slide 9: |
− | + | ||
− | + | 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/ | ||
+ | | 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;"| | ||
+ | |||
+ | |- | ||
+ | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10: | ||
+ | |||
+ | 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:0.05pt solid #000000;padding:0.097cm;"| | ||
+ | |||
+ | |||
+ | |- | ||
+ | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 11: | ||
+ | |||
+ | 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/ | ||
+ | | 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;"| | ||
+ | |||
+ | |||
+ | |- | ||
+ | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12: | ||
+ | |||
+ | 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/ | ||
+ | | 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;"| | ||
+ | |||
+ | |||
+ | |- | ||
+ | | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13: Acknowledgements | ||
+ | | 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 Tutorials 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 the | + | More information on the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro |
|- | |- |
Latest revision as of 14:41, 5 August 2019
Tutorial: Turbulent flow in a lid driven cavity
Script : Chaitanya Talnikar, Shekhar Mishra , Rahul Joshi
Narration : Rahul Joshi
Keywords: Video tutorial ,CFD,Turbulent Flow in Lid driven cavity,OpenFOAM.
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Slide 1: | Hello and welcome to the spoken tutorial on modelling Turbulent flow in a Lid Driven Cavity using OpenFOAM |
Slide 2:
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In this tutorial I will show you
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Slide 3:
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To record this tutorial I am using
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Slide 4:
System Requirement
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Slide 5 :
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To practice this tutorial you should have some basic knowledge of
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Demo:
Set up working Directory
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This problem is identical in geometry and boundary condition to the 'Lid Driven Cavity' problem discussed in the basic level tutorial
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Slide 6: Solver | We are using a Transient solver for incompressible turbulent flow of Newtonian fluids called as pisoFoam |
Steps in setting up the problem | Now let us open the Terminal window by pressing Ctrl+Atl+T keys together |
In the terminal window
Type cd tutorials |
In the terminal window type run and press Enter
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Type cd incompressible | Now type cd space incompressible and press Enter |
Type cd pisoFoam | Now type cd space pisoFoam (Note that F here is capital ) and press Enter |
Type ls
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Now type ls and press Enter
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Type cd ras
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Our folder name is cavity
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Type cd cavity
ls |
You can see the cavity folder. Let me clear this off
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Point to the 3 folders
Boundary and Initial conditions
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You can see three folders 0, constant and system
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Inside the 0 folder
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To do this, in the command terminal type cd space 0 and press Enter
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Point to the files as per narration | You can see the files named as epsilon, k, nut, nutilda, p, R and U
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Type cd.. | Now type cd space dot dot and press Enter
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Type cd constant
Type ls |
Let us open the constant folder
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PolyMesh folder and fluid property files | In this you will see the polyMesh folder containing
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Point to the two files as per narration | In this case you will see two more files other than transportProperties named as RASProperties and turbulenceProperties
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RASProperties | In the terminal type gedit (space) RASProperties and press Enter
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turbulentProperties | Now in the command terminal, type gedit space turbulentproperties and press Enter
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TransportModel
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Now let us open the transportProperties model
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Do not change the blockMeshDict file
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We are not changing the geometry in this case
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Type cd.. | In the terminal type cd space dot dot and press Enter
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Meshing the geometry
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Now, we are done with the setup
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Running the solver : pisoFoam | Now we can run the solver
The iterations running can be seen in the terminal window
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Post-processing the results in paraview | The iterations running will stop at the end of the time step
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View the geometry
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On the left hand side in the Object Inspector menu click on Apply
And from the drop down menu change from solid colour to capital U
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Click on the Play button on VCR control for animation
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Now on the top of the ParaView window you can see the VCR control
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Visualise the streamlines
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Now to visualise the stream lines
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Streamlines on top | On the left hand side of the Object inspector menu you can see Apply. Click on it
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Streamlines view | You can also change the orientation in which the stream lines are viewed
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Shift to right >> change point source to line source | Let me shift this to the right and change from point source to line source |
Plot streamlines about X, Y and Z axis
Click on the X axis Delete this |
You can see the X, Y and Z axes which are visible
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Plot data over line
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You can also plot the velocity along X and Y axis using plot over line
To do this go to Filters > Data Analysis and Plot over line Save the data as dot csv from the File menu Click on Save Data |
Plot the results
For Re= 10000 |
You can plot this data in LibreOffice spreadsheet or any other plotting software of your choice
Now let me switch back to the slides The results obtained can be validated by using results of Ghia et.al for Reynolds Number, Re equal to 10000 |
Slide 7:
Summary |
That's all we have in this tutorial
Let us summarise.
This brings us to the end of the tutorial |
Slide 8: Assignment | As an assignment
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http://spoken-tutorial.org/What_is_a_Spoken_Tutorial
| |
The Spoken Tutorial Project Team
-Conducts workshops using spoken tutorials -Gives certificates to those who pass an online test -For more details please write to contact at the rate spoken hyphen tutorial dot org | |
Slide 9:
Forum to answer questions
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Slide 10:
Forum to answer questions
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Slide 11:
Lab Migration Project
For more details visit this site: http://cfd.fossee.in/ |
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Slide 12:
Case Study Project
For more details visit this site: http://cfd.fossee.in/ |
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Slide 13: Acknowledgements | Spoken Tutorials 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 the this mission is available at this URL http://spoken-tutorial.org/NMEICT-Intro |
About the contributor | The script is contributed by Shekhar Mishra and Chaitanya talnikar
This is Rahul Joshi from IIT BOMBAY signing off. Thanks for joining |