T721_221 lockExchange

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OpenFoamのサンプル確認（パラメータやキーワードの覚書）です。

バージョン : Windows版（OpenFOAM-v2206-windows-mingw.exe）

ベース

チュートリアルフォルダ：チュートリアル場所（windows）

引用元

<チュートリアルフォルダ>\multiphase\twoLiquidMixingFoam\lockExchange

結果図

密度の異なる液体の混合です。赤：密度1000 青：密度990

作業

基本的な流れはT703 OpenFoam tipsと同じです。（または作業）

//チュートリアルからサンプルをコピーしておきます。//
//0.origから0へ（.org削除）

//コマンド:メッシュ作成
blockMesh

//コマンド実行
setFields

//計算実行//
twoLiquidMixingFoam

//ParaView用VTK変換//
foamToVTK

全体構造

//初期フォルダ・ファイル構成
lockExchange                   
├ 0.orig                      
│ ├ alpha.sludge             
│ ├ p_rgh                    
│ └ U                        
├ constant                    
│ ├ g                        
│ ├ transportProperties      
│ └ turbulenceProperties     
├ system                      
│ ├ blockMeshDict            
│ ├ controlDict              
│ ├ fvSchemes                
│ ├ fvSolution               
│ └ setFieldsDict            
├ Allclean                    
└ Allrun                      

0.orig

alpha.sludge

dimensions      [0 0 0 0 0 0 0];

internalField   uniform 0;

boundaryField
{
    "(left|right|bottom|top)"
    {
        type            zeroGradient;
    }

    frontBack
    {
        type            empty;
    }
}

p_rgh

dimensions      [1 -1 -2 0 0 0 0];

internalField   uniform 0;

boundaryField
{
    "(left|right|bottom|top)"
    {
        type            fixedFluxPressure;
    }

    frontBack
    {
        type            empty;
    }
}

U

dimensions      [0 1 -1 0 0 0 0];

internalField   uniform (0 0 0);

boundaryField
{
    "(left|right|bottom|top)"
    {
        type            slip;
    }

    frontBack
    {
        type            empty;
    }
}

constant

g

dimensions      [0 1 -2 0 0 0 0];
value           (0 -9.81 0);

transportProperties

Dab         1e-06;
alphatab    1;

phases (sludge water);

sludge
{
    transportModel  Newtonian;
    nu              1e-06;
    rho             1000;
}

water
{
    transportModel  Newtonian;
    nu              1e-06;
    rho             990;
}

turbulenceProperties

simulationType  laminar;

system

blockMeshDict

scale   1;

vertices
(
    (0 0 0)
    (10 0 0)
    (10 2 0)
    (0 2 0)
    (0 0 2)
    (10 0 2)
    (10 2 2)
    (0 2 2));

blocks
(
    hex (0 1 2 3 4 5 6 7) (200 40 1) simpleGrading (1 1 1)
);

edges
(
);

boundary
(
    left
    {
        type wall;
        faces
        (
            (0 4 7 3)
        );
    }
    right
    {
        type wall;
        faces
        (
            (1 5 6 2)
        );
    }
    bottom
    {
        type wall;
        faces
        (
            (0 1 5 4)
        );
    }
    top
    {
        type wall;
        faces
        (
            (3 2 6 7)
        );
    }
    frontBack
    {
        type empty;
        faces
        (
            (0 1 2 3)
            (4 5 6 7)
        );
    }
);

mergePatchPairs
(
);

controlDict

application     twoLiquidMixingFoam;

startFrom       startTime;

startTime       0;

stopAt          endTime;

endTime         100;

deltaT          0.05;

writeControl    adjustable;

writeInterval   1;

purgeWrite      0;

writeFormat     ascii;

writePrecision  6;

writeCompression off;

timeFormat      general;

timePrecision   6;

runTimeModifiable yes;

adjustTimeStep  on;

maxCo           0.5;

maxAlphaCo      0.5;

maxDeltaT       1;

fvSchemes

ddtSchemes
{
    default         Euler;
}

gradSchemes
{
    default         Gauss linear;
}

divSchemes
{
    default         none;

    div(rhoPhi,U)  Gauss linear;
    div(phi,alpha)  Gauss vanLeer;
    div(phi,k)      Gauss limitedLinear 1;
    div(((rho*nuEff)*dev2(T(grad(U))))) Gauss linear;
}

laplacianSchemes
{
    default         Gauss linear corrected;
}

interpolationSchemes
{
    default         linear;
}

snGradSchemes
{
    default         corrected;
}

fvSolution

solvers
{
    "alpha.sludge.*"
    {
        nAlphaSubCycles     2;
        nAlphaCorr          1;

        solver          smoothSolver;
        smoother        GaussSeidel;
        tolerance       1e-9;
        relTol          0;
        nSweeps         1;
    }

    p_rgh
    {
        solver          GAMG;
        tolerance       1e-7;
        relTol          0.01;
        smoother        GaussSeidel;
    }

    p_rghFinal
    {
        $p_rgh;
        relTol          0;
    }

    U
    {
        solver          smoothSolver;
        smoother        GaussSeidel;
        tolerance       1e-7;
        relTol          0.1;
        nSweeps         1;
    }

    UFinal
    {
        $U;
        relTol          0;
    }
}

PIMPLE
{
    momentumPredictor   yes;
    nOuterCorrectors    1;
    nCorrectors         2;
    nNonOrthogonalCorrectors 0;

    pRefValue           0;
    pRefPoint           (0.1 0.1 1);
}

setFieldsDict

defaultFieldValues
(
    volScalarFieldValue alpha.sludge 0
    volVectorFieldValue U (0 0 0)
);

regions
(
    boxToCell
    {
        box (0 0 0) (5 2 2);

        fieldValues
        (
            volScalarFieldValue alpha.sludge 1
        );
    }
);

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