各位老师大家好，我正在使用openfoam10中的multiphaseEulerFoam求解器，模拟的为气液两相流旋转机械，目前我在扭矩的提取上碰到了问题。以下是我的functions：
forces
{
type forces;
libs ("libforces.so");
writeControl timeStep;
writeInterval 1;
rho rhoInf;
patches (WALLIMP);
rhoInf 1000;
CofR (0 0 0);
pitchAxis (0 0 -1);
U U.water;
p p;
}
当我运行计算时，出现了如下提示：
--> FOAM FATAL ERROR:
No valid model for viscous stress calculation
From function Foam::tmp<Foam::GeometricField<Foam::SymmTensor<double>, Foam::fvPatchField, Foam::volMesh> > Foam::functionObjects::forces::devTau() const
in file forces/forces.C at line 288.
FOAM exiting
我该如何解决？谢谢各位老师！
