推板造波-不规则波

bcp

求助各位大佬，我用openfoam9自定义了一个推板造波边界条件的代码，代码中植入了Jonswap谱想要模拟不规则波，代码编译没有问题，设置算例后运行没有问题，在波高监测点得到的波形图像也没有问题，但是得到的波高和我设置的有效波高差距很大，差了一个数量级是什么原因呢，试了好多次都解决不了，有没有大佬懂的，下面是我的代码还有算例设置

code_text
````scalar  randomwaveDisplacementPointPatchVectorField:: beita()
{
    return (0.06238/(0.23+0.0336*gama_-0.185*pow((1.9+gama_),-1)))*(1.094-0.01916*log(gama_));
}
scalar  Foam::randomwaveDisplacementPointPatchVectorField:: k1(scalar x)
{
    scalar k1=x*x/g_;
    int maxIter =200;
    scalar tol = 1e-12;
    for (int iter = 0; iter < maxIter; iter++)
    {
        scalar k_new = x*x/g_/ tanh(k1*depth_);
        if (mag(k_new - k1)<tol) break;
        k1 = k_new;
    }
    return k1;
}

void Foam:: randomwaveDisplacementPointPatchVectorField::updateCoeffs()
{
    if (updated())
    {
        return;
    }

    scalar t = this->db().time().value();
    scalar deltaf=(fmax_-fmin_)/n_;
    vector sumpushU = vector::zero;
    for (int i=0; i<n_; i++)
    {
        scalar f0=fmin_+i*deltaf;
        scalar f1=fmin_+(i+1)*deltaf;
        scalar f= (f0+f1)/2;
        scalar sigma = (f <= f_p) ? 0.07 : 0.09;
        scalar omega=2*PI*f;
        scalar k=k1(omega);
        std::random_device rd;
        std::mt19937 gen(rd());
        std::uniform_real_distribution<> dis(0,2*PI);
        scalar theta =dis(gen);
        scalar Sf=beita_*pow(height_,2)*pow(T_p,-4)*pow(f,-5)*exp(-1.25*pow((T_p*f),-4))*pow(gama_,exp(-pow(((f-f_p)/(sigma*f_p)),2)/2));
        scalar A = sqrt(2*Sf*deltaf);
        scalar w = (4*pow(sinh(k*depth_),2)/(2*k*depth_+sinh(2*k*depth_)));
        vector pushU = vector(((omega * A *cos(omega * t + theta))/w),0,0);
        sumpushU +=pushU
}
vector pushU=sumpushU;
Field<vector>::operator=(pushU);
Info << "Time = " << t;
Info << "regular Wave" << "push Vector is" << pushU.component(0);
 fixedValuePointPatchField::updateCoeffs();
}

code_text


internalField   uniform (0 0 0);

boundaryField
{
    #includeEtc "caseDicts/setConstraintTypes"

    left
    {
        type            randomwaveDisplacement;
        height          0.08;
        depth           0.6;
        T_p             2.0;
        f_p             0.5;
        gama            3.3;
        n               100;
        fmin            0.1;
        fmax            10;
        waveType        randomwave;
        value           uniform (0 0 0);
    }
    right
    {
        type            fixedValue;
        value           uniform (0 0 0);
    }
    top
    {
        type            slip;
    }
    bottom
    {
        type            slip;
    }
}

chenboyao

添加湍流模型了吗？如果采用层流，正常造波应该差距不大，如果采用了湍流模型，可能存在波浪衰减问题，数值造波的时候由于湍流所导致的能量耗散，可能会使得造波精度差距有点大。但是采用层流那正常应该差距不大，可能就是其他问题了

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推板造波-不规则波