openFOAM codedFixedValue边界条件中调用标量场的问题

[L_LL]

我尝试将of2306的jouleHeating算例中的jouleHeating::V从恒定电压改为恒定电流设置，因此想要通过电流乘以电阻来计算电压，其中电阻的设置涉及到电导率，而这个电导率是随着温度的变化变化的，所以想要读取标量场中的电导率（sigma)数据。
以下是sigma设置

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v2206                                 |
|   \\  /    A nd           | Website:  www.openfoam.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      fvOptions;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

heating
{
    type            jouleHeatingSource;
    active          true;

    jouleHeatingSourceCoeffs
    {
        anisotropicElectricalConductivity no;

        // Optionally specify sigma as a function of temperature
        //sigma           127599.8469;
        //
        sigma           table
        (   
            (273      59600000)
            (298      58000000)
            (500      32000000)
        );
    }
}


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

下面是我写的codedFixedValue边界条件

boundaryField
{

    inlet
    {
        type            codedFixedValue;
        value           uniform 0;// 初始值，可以为0或其他合理的数值
        name            dynamicV;
       
        codeInclude
    	#{
    	    #include "mathematicalConstants.H"
    	    #include "fvCFD.H"
    	#};
    	codeOptions
    	#{
       	    -I$(LIB_SRC)/finiteVolume/lnInclude \
            -I$(LIB_SRC)/meshTools/lnInclude
   	#};
   	codeLibs
   	#{
   		-lmeshTools \
   		-lfiniteVolume
   	#};
   	
       code
       #{
            const fvMesh& mesh = this->patch().boundaryMesh().mesh();
	    dictionary C = mesh.lookupObject<dictionary>("fvOptions");
           
            // 定义常数
            scalar I = 0.6;
            scalar L = 0.007875;
            scalar A = 1.125e-8;

           
   	    const volScalarField& sigma = mesh.lookupObject<volScalarField>("sigma");
	    
	    scalar sigma = gMax(sigma);

            // 计算电阻
            scalar R = L / (sigma * A);
            // 计算电压，确保恒定电流 I
            scalar V =  I * R;
	    Info << "V: " << V << endl;
	    Info << "R: " << R << endl;
	    Info << "sigma: " << sigma << endl;
            // 将计算出的电压值作为边界条件
            operator==(V);
        #};

    }

    outlet
    {
        type            fixedValue;
        value           uniform 0;
    }

这样的写法会出现

Failed wmake "dynamicCode/dynamicV/platforms/linux64GccDPInt32Opt/lib/libdynamicV_c6587780c1810df06b6735b285db38c4418d36ec.so"


file: 0/solid/jouleHeatingSource:V.boundaryField.inlet at line 28 to 47.

    From void Foam::codedBase::createLibrary(Foam::dynamicCode&, const Foam::dynamicCodeContext&) const
    in file db/dynamicLibrary/codedBase/codedBase.C at line 245.

FOAM exiting
code_text

但是如果我把上面的sigam换成T又是可以运行的，想问问大家知道我该如何去写这段代码吗

[李东岳]

const volScalarField& sigma = mesh.lookupObject<volScalarField>("sigma");

这一行换成T就可以了么？

[L_LL]

@李东岳 是的，这里换成T后下面的scalar T = gMax(T)函数也可以正常使用