OpenFOAM小代码

马乔

wordHashSet unMatchedkeys(dict.toc());
forAll(names, nameI)
{
    const word& name = names[nameI];
    const entry* ePtr = dict.findEntry(name, keyType::REGEX);
    if(ePtr)
       unMatchedKeys.erase(ePtr->keyWord());
}

马乔

class base
{
private:
    bool ownedByRegistry_;
public:
    template<class Type>
    static void store(Type* p)
    {
	//p->base::ownedByRegistry_ =true;
	p->ownedByRegistry_ = true;
	p->printInfo();
    }
};

class derived
:public base
{
public:
    derived() {}
    void printInfo()
    {
	Info << "derived class" << endl;
    }
};

int main(int argc, char *argv[])
{
...
    derived d;
    base::store(&d);
...
}

D.Benjamin

@东岳在 OpenFOAM小代码中说：

东岳老师，请教几个小问题：

在编译过程中报错：'mesh_' was not declared，所以mesh_是不可以直接使用的，但是我不太理解什么是类内可以调用的成员变量，感觉速度场U，温度场T等都是类内可以调用的成员变量？
如果mesh_不可获取，U_可获取。上面说mesh_是类内可以调用的成员变量，然而U_又是什么？
声明一个tmp变量，mesh_表示什么意思呢?在声明U、T、p等场的时候，mesh_的位置常常写的是mesh

期待回复，祝好！

李东岳

@D-Benjamin

我不太理解什么是类内可以调用的成员变量

我说的这个东西，就是类的成员变量。如果存在成员变量mesh, 它在OpenFOAM类内都被定义为mesh_，在类外那肯定是mesh，后面有没有_只是写法风格，OpenFOAM类里面的变量都带_，类外面的变量都没有_。

OpenFOAM这面类继承会涉及到好几层。你可以一层一层的找有没有mesh_的声明，你可以直接用mesh_看看是否报错，没报错就是声明了，报错了就是没生命。

霜染丹枫

@Zhong-combustion 你好，我目前也在用LES做加热管流的湍流研究，关于湍流入口的设置看了一些资料，如有兴趣，可以加个qq:1191364394，共同学习探讨。

Zhy2022

东岳老师您好，请问如果是两相流中相分数（比如alpha.particle）随时间变化，它在codeFixedValue中应该怎么定义呢？

李东岳

@Zhy2022 codedFixedValue上面不是有嘛，你举一反三一下咩

Zhy2022

@东岳东岳老师，没能找出报错原因，只能再来麻烦一下您：

INLET1
    {
        type            codedFixedValue;
        value           $internalField;
        name            stepInjection;
        redictType      variedValue;
        code
        #{
             scalar alphapar = this->patch().fluid().phase();

             scalar t = this->db().time().value();
       
             if(t >= 0 && t<=5)
             {
                  alphapar = 0;
             }
             
             else
	     {
	          alphapar = 0.15;
	     }

	     operator==(alphapar)

         #};
        
    }

Zhy2022

@东岳东岳老师，问题已解决！无法编译与文件路径有关

veen

fvOption小工具

根据GitHub上一个python脚本改写了一个生成fvOption的小工具 https://github.com/Veenxz/fvSchemes
用Foam没有多久，各位大佬可以多提提意见。

# version 2.0
# Based on https://github.com/Carlopasquinucci/fvSchemes
# Generation by Veenxz
# relaesed under license GPL GNU 3.0

steady = True
pseudo_transient = False
precision = 2    # First order 1 or Second order 2
unbounded = False
LUST = False
secondorder = True

maxOrtho = 80
maxSkew = 20

# Header and Footer
h = [
    "/*--------------------------------*- C++ -*----------------------------------*|",
    "| =========                 |                                                 |",
    "| \\\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |",
    "|  \\\    /   O peration     | Website:  https://openfoam.org                  |",
    "|   \\\  /    A nd           | Version:  7                                     |",
    "|    \\\/     M anipulation  |                                                 |",
    "\*---------------------------------------------------------------------------*/",
    "FoamFile", "{", "    version     2.0;", "    format      ascii;",
    "    class       dictionary;", '    location    "system";', "    object      fvSchemes;",
    "}",
    "// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //",
    ""
]
footer = '\n// ************************************************************************* //'

nonOrthogonalCorrectors = 1
if (maxOrtho) > 80:
    print(
        'Warning: mesh is not so nice. Use 3 nonOrthogonalCorrectors in fvSolution file'
    )
    nonOrthogonalCorrectors = 3
if (maxSkew) > 8:
    print('Warning: mesh is not so nice')

if (maxOrtho) > 80:

    gradSchemes = (
        '{\n    default          cellLimited Gauss linear 0.5;\n'
           '    grad(U)          faceLimited Gauss linear 1.0;\n}'
    )
    divSchemes = (
        '{\n    div(phi,U)       Gauss linearUpwind grad(U);\n'
           '    div(phi,omega)   Gauss upwind;\n'
           '    div(phi,k)       Gauss upwind;\n'
           '    div(phi,e)       Gauss upwind;\n'
           '    div((nuEff*dev(T(grad(U))))) Gauss linear;\n}'
    )
    laplacianSchemes = (
        '{\n    default          Gauss linear limited 0.333;\n}'
    )
    snGradSchemes = (
        '{\n    default          Gauss linear limited 0.333;\n}'
    )

    blending = 0.2
    nonOrthogonalCorrectors = 3

if (maxOrtho) > 70:

    gradSchemes = (
        '{\n    default          cellLimited Gauss linear 0.5;\n'
           '    grad(U)          cellLimited Gauss linear 1.0;\n}'
    )
    divSchemes = (
        '{\n    div(phi,U)       Gauss linearUpwind grad(U);\n'
           '    div(phi,omega)   Gauss linearUpwind grad(omega);\n'
           '    div(phi,k)       Gauss linearUpwind grad(k);\n'
           '    div(phi,e)       Gauss linearUpwind grad(e);\n'
           '    div((nuEff*dev(T(grad(U))))) Gauss linear;\n}'
    )
    laplacianSchemes = (
        '{\n    default          Gauss linear limited 0.5;\n}'
    )
    snGradSchemes = (
        '{\n    default          Gauss linear limited 0.5;\n}'
    )

    blending = 0.5
    nonOrthogonalCorrectors = 3

if (maxOrtho) > 60:

    gradSchemes = (
        '{\n    default          cellMDLimited Gauss linear 0.5;\n'
           '    grad(U)          cellMDLimited Gauss linear 0.5;\n}'
    )
    divSchemes = (
        '{\n    div(phi,U)       Gauss linearUpwind grad(U);\n'
           '    div(phi,omega)   Gauss linearUpwind grad(omega);\n'
           '    div(phi,k)       Gauss linearUpwind grad(k);\n'
           '    div(phi,e)       Gauss linearUpwind grad(e);\n'
           '    div((nuEff*dev(T(grad(U))))) Gauss linear;\n}'
    )
    laplacianSchemes = (
        '{\n    default          Gauss linear limited 0.777;\n} '
    )
    snGradSchemes = (
        '{\n    default          Gauss linear limited 0.777;\n} '
    )

    blending = 0.7
    nonOrthogonalCorrectors = 2

if (maxOrtho) > 0:

    gradSchemes = (
        '{\n    default          cellMDLimited Gauss linear 0;\n'
           '    grad(U)          cellMDLimited Gauss linear 0.333;\n}'
    )
    divSchemes = (
        '{\n    div(phi,U)       Gauss linearUpwind grad(U);\n'
           '    div(phi,omega)   Gauss linearUpwind grad(omega);\n'
           '    div(phi,k)       Gauss linearUpwind grad(k);\n'
           '    div(phi,e)       Gauss linearUpwind grad(e);\n'
           '    div((nuEff*dev(T(grad(U))))) Gauss linear;\n}'
    )
    laplacianSchemes = (
        '{\n    default          Gauss linear limited 0.95;\n}'
    )
    snGradSchemes = (
        '{\n    default          Gauss linear limited 0.95;\n}'
    )

    blending = 0.8
    nonOrthogonalCorrectors = 1

if (LUST):
    gradSchemes = (
        '{\n    default          Gauss linear;\n'
           '    grad(U)          cellMDLimited leastSquares 1;\n}'
    )
    divSchemes = (
        '{\n    div(phi,U)       Gauss LUST grad(U);\n'
           '    div(phi,omega)   Gauss LUST grad(omega);\n'
           '    div(phi,k)       Gauss LUST grad(k);\n'
           '    div(phi,e)       Gauss LUST grad(e);\n'
           '    div((nuEff*dev(T(grad(U))))) Gauss linear;\n}'
    )
    laplacianSchemes = (
        '{\n    default          Gauss linear corrected;\n}'
    )
    snGradSchemes = (
        '{\n    default          Gauss linear corrected;\n}'
    )
    
    blending = 0.9
    nonOrthogonalCorrectors = 1

if (steady):
    ddtSchemes = (
        '{\n    default          steadyState;\n}'
    )
    if (pseudo_transient):
                ddtSchemes = (
                    '{\n    default          localEuler;\n}'
                )
else:
    ddtSchemes = (
        '{\n    default           CrankNicolson ' + str(blending) + ' ;\n}'
    )
    if precision == 1:
        ddtSchemes = (
            '{\n    default           Euler;\n}'
        )
    if (unbounded):
        ddtSchemes = (
            '{\n    default           backward;\n}'
        )


wallDist = (
    "{\n    method           meshWave;\n}"
)

#open fvSchemes and write inside

f = open("fvSchemes", "w")

for i in h:
	f.write(i + "\n")

f.write("ddtSchemes" + "\n")
f.write(ddtSchemes + "\n")
f.write("\n")
f.write("gradSchemes" + "\n")
f.write(gradSchemes + "\n")
f.write("\n")
f.write("divSchemes" + "\n")
f.write(divSchemes + "\n")
f.write("\n")
f.write("laplacianSchemes" + "\n")
f.write(laplacianSchemes + "\n")
f.write("\n")
f.write("snGradSchemes" + "\n")
f.write(snGradSchemes + "\n")
f.write("\n")
f.write("wallDist" + "\n")
f.write(wallDist + "\n")
f.write(footer)

f.close()

print('File fvSchemes created')

李东岳

@veen 厉害厉害

veen

@veen 这个代码还有些格式没法用……我回头测试了再放到github大家看仓库里边的代码就好了。

hongjiewang

@李东岳在 OpenFOAM小代码中说：

IOField<scalar> utau
(
IOobject
(
"utau",
runTime.constant(),
"../postProcessing",
mesh,
IOobject::NO_READ,
IOobject::AUTO_WRITE
),
scalarField(totalFSize,0.0)
);

请问老师，如果我想要在postProcessing中输出一个标量，他只是一个数，并不是场量，我应该怎么定义他的类型。上面这种方法是不是只适应于场量的输出。我想输出的是下面c的数值。

const volScalarField& b = mesh().lookupObject<volScalarField>("alpha.liquid");
scalar c= b.weightedAverage(mesh().V()).value();

李东岳

@hongjiewang

    IOList<scalar> utau
    (
        IOobject
        (
            "utau",
            runTime.constant(),
            "../postProcessing",
            mesh,
            IOobject::NO_READ,
            IOobject::AUTO_WRITE 
        ),
        1
    );
    
    utau[0] = b.weightedAverage(mesh().V()).value();

hongjiewang

@李东岳

  totalLiquid
  {        
        libs            (utilityFunctionObjects);
        type            coded;
        name            totalLiquid;
        enabled         true;
        writeControl    timeStep;
        writeInterval   1;
        
        codeOptions
        #{
            -I$(LIB_SRC)/meshTools/lnInclude
        #};

        codeExecute
        #{

            const volScalarField& b =
                mesh().lookupObject<volScalarField>("alpha.liquid");

            IOList<scalar> liquidFraction
            (
                IOobject
                (
                    "liquidFraction",
                    mesh().time().constant(),
                    "../postProcessing",
                    mesh(),
                    IOobject::NO_READ,
                    IOobject::AUTO_WRITE
                ),
                1
            );
            liquidFraction[0] = b.weightedAverage(mesh().V()).value();
        #};
    }

东岳老师，我这样添加到controlDict里，运行后postProcessing里并没有出现liquidFraction的值。
1618213472(1).png

hongjiewang

@hongjiewang 在 OpenFOAM小代码中说：

@李东岳

  totalLiquid
  {        
        libs            (utilityFunctionObjects);
        type            coded;
        name            totalLiquid;
        enabled         true;
        writeControl    timeStep;
        writeInterval   1;
        
        codeOptions
        #{
            -I$(LIB_SRC)/meshTools/lnInclude
        #};

        codeExecute
        #{

            const volScalarField& b =
                mesh().lookupObject<volScalarField>("alpha.liquid");

            IOList<scalar> liquidFraction
            (
                IOobject
                (
                    "liquidFraction",
                    mesh().time().constant(),
                    "../postProcessing",
                    mesh(),
                    IOobject::NO_READ,
                    IOobject::AUTO_WRITE
                ),
                1
            );
            liquidFraction[0] = b.weightedAverage(mesh().V()).value();
        #};
    }

东岳老师，我这样添加到controlDict里，运行后postProcessing里并没有出现liquidFraction的值。
1618213472(1).png

需要修改两个部分，
1.在下方添加 .write（）
2.将codeExecute改为codeWrite
之后就可以得到想要的相含量结果。

hongjiewang

@李东岳

FoamFile
{
    version     2.0;
    format      ascii;
    class       scalarField;
    location    "constant/../postProcessing";
    object      totalLiquid;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

1(0.2)

麻烦老师再帮我看一下，为什么每次都只会输出一个时刻的值，不会随时间增加输出的

李东岳

meanDiameter
    {
        type            coded;
        libs            ("libutilityFunctionObjects.so");
        name            error;
    
        codeExecute
        #{
            const volScalarField& d =
                mesh().lookupObject<volScalarField>("d.alpha.oil");

            scalar d32 = d.weightedAverage(mesh().V()).value();
    
            if (Pstream::master())
            {
                std::ofstream file;
                file.open ("d32", std::ofstream::out | std::ofstream::app);
                file << mesh().time().timeName() << " " << d32 << "\n";
                file.close();
            }
        #};
    }

我最近也凑巧要用这个，我用的上面这种方式。

五好青年

@李东岳
请问东岳老师

(1) 东岳老师，您上面写的：codedFixedValue
(2) yfclark朋友，上面写的：CodeStream

在自定义边界条件方面，这两个有啥区别啊，我研究了几天没想明白

五好青年

@yfclark
朋友，您好：

codedFixedValue和CodeStream

你知道在自定义边界条件方面，这两个有啥区别啊，我研究了几天没想明白

CFD中文网

OpenFOAM小代码