CFD Online Discussion Forums - Starting with LRR/SSG

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Starting with LRR/SSG

Hello my friends,

I recently decided to join the OF family and finished my simulations with the SST model quite well.
Now, I want to run my case with an RSM model (LRR or SSG) but I'm stucked here. My case is a 3D closed channel flow with cyclic BC at the inlet/outlet.

I implemented my R file in /0 like this:

Code:

 



/*--------------------------------*- C++ -*----------------------------------*\

  =========                 |

  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox

   \\    /   O peration     | Website:  https://openfoam.org

    \\  /    A nd           | Version:  8

     \\/     M anipulation  |

\*---------------------------------------------------------------------------*/

FoamFile

{

    version     2.0;

    format      ascii;

    class       volSymmTensorField;

    location    "0";

    object      R;

}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //



dimensions      [0 2 -2 0 0 0 0];



internalField   uniform (1.5625 -0 -0 1.5625 -0 1.5625);





boundaryField

{

    CWALL

    {

        type            kqRWallFunction;

        value           uniform (1.5625 -0 -0 1.5625 -0 1.5625);

    }

    INLET

    {

        type            cyclic;

    }

    OUTLET

    {

        type            cyclic;

    }

}

After trying to start my simulation with simpleFoam I get this error:

Code:

...





Starting time loop





turbulenceFields turbulenceFields1: storing fields:

  "R"









--> FOAM FATAL ERROR:

attempted assignment to self

Unfortunatly, I didn't find any tutorials about LRR/SSG which could help me, neither a solution for my error.

Does anybody have an idea why/where I did a mistake?

Hi Kosdalak,
I had the same problem.
I removed the "#includefunc R" from the controlDict since this solver saves the R tensor itself.

Hi Ali,

yes I solved my problem and managed to get some simulations running with these models.

Can you be more specific about your problem?

Is the R file missing or is there any other error message?

Greetings
Jan

Possibly this helps?

https://www.cfd-online.com/Forums/op...18-simplefoam-
tutorial-pitzdaily-using-reynolds-stress-tensor-lrr-rasmodel.html

I guess the link is broken. This should work: https://www.cfd-online.com/Forums/op...-rasmodel.html

I think the error was due to the "turbulenceFields" function object. At least the boundary condition file for "R" does not contain any problematic content, it seems.

Could you switch off this function object, and rerun the case of yours?