How do I know which solver
 

Hello,

I'm a student and my task is to compile some openFOAM cases.

I've done the basic examples of the tutorial on the OpenFOAM homepage, but I'm still newbie.

My question is:

How do I know which solver I have to use?
SimpleFoam, nonEulerianPolyFoam, icoFoam etc.
Can I find a hint in any of the documents, which to use?

The problem is that all solvers I have tried randomly, there are always undefined keywords in "transport properties" like nu.

Thanks for your help

Marvin

Dear Marvin,

you can have a look at the following site to check which solver you have to use for your Problem.

http://www.openfoam.org/features/standard-solvers.php


What is the Problem with "nu" ? it is the kinematic viscosity (laminar) - you can have a look into the source code of the thermodynamics. You will find comments which give you the Information about a variable.

Additionally you can use doxygen http://www.openfoam.org/docs/cpp/


Normally you have mu in the navier-stokes-equation but in the incompressilbe solvers everything is divided with the density so mu/rho = nu.

Therefor you Need nu in the transportProperties.
In other solvers you will have to define mu.

Regards
Tobi

Dear Tobi,

thanks for your fast advice. Indeed rho is defined in transport properties. But not mu.

My advisor told me now I should try viscoelasticinterFoam. I can't find such a solver, nor in your link neither is it implemented in my OpenFoam.

Instead I tried interFoam. There I received the following mistake.

FOAM FATAL IO ERROR:
keyword PIMPLE is undefined in dictionary "/home/marvin/OpenFOAM/marvin-2.2.1/run/Test/system/fvSolution"

file: /home/marvin/OpenFOAM/marvin-2.2.1/run/Test/system/fvSolution at line 27.

Already changed PICO in PIMPLE but didn't work.
Do you have any clue what I can try?

Thanks Marvin

I only know the solver - viscoelasticFluidFoam - but that is included in the extend version.

The solver is telling you how variable it needs if there is some missing.
The best way is, copying a tutorial case and Change the necessary files.


In your case with the tutorial:

1. wrong tutorial Version
2. damaged tutorial (but I think that is not the case)
3. you did something wrong


I am not able to help you because I dont know which steps you are doing.

If you can't find a solver in the mainline OF-version, it is usually part of the extend-project.

Regarding PIMPLE. Are all the brackets closed?

Thanks for your help. Now I've seen there are also some libaries I have to extract from the extended project. I hope this works.