LamBremhorstKE模型

lambs

请教各位老师，open foam在使用低雷诺数湍流模型LamBremhorstKE时，需不需要选择壁面函数？

dzw05

@lambs 理论上低雷诺数模型无需壁面函数。但在OpenFOAM中，最好采用壁面函数，例如对K方程采用kLowReWallFunction，epsilon方程采用epsilonLowReWallFunction。

lambs

@dzw05 老师0文件夹下的边界条件f，nuTilda，omega，v2是什么意思啊，该怎么填呢 0_1535336871695_ZL77$VT%@G_0R5.png

dzw05

@lambs 其实这是不同湍流模型用到的变量。f和v2是v2f湍流模型，nuTilda是SA模型的变量；k和omega是k-omega模型的变量。nut则是湍流粘性，所有湍流模型都会用到。

lambs

@dzw05 就是说不是所有的文件都有用，只需要填写自己使用模型的变量的边界条件就可以是吗（在LB模型中只填写nut，k，epsilon，p，u）

lambs

我在使用simpleFoam运行这个模型时出现了这样的错误，这是为什么？


--> FOAM FATAL ERROR: 

    request for volScalarField::Internal LamBremhorstKE:G from objectRegistry region0 failed
    available objects of type volScalarField::Internal are

8
(
nut
yWall
k
nu
p
(sqr((1-exp((-0.0165*((sqrt(k)*yWall)|nu)))))*(1+(20.5|((sqr(k)|(nu*epsilon))+1e-15))))
(sqr(k)|(nu*epsilon))
epsilon
)


    From function const Type& Foam::objectRegistry::lookupObject(const Foam::word&) const [with Type = Foam::DimensionedField<double, Foam::volMesh>]
    in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/OpenFOAM/lnInclude/objectRegistryTemplates.C at line 193.

FOAM aborting

#0  Foam::error::printStack(Foam::Ostream&) at ??:?
#1  Foam::error::abort() at ??:?
#2  Foam::DimensionedField<double, Foam::volMesh> const& Foam::objectRegistry::lookupObject<Foam::DimensionedField<double, Foam::volMesh> >(Foam::word const&) const at ??:?
#3  Foam::epsilonLowReWallFunctionFvPatchScalarField::calculate(Foam::turbulenceModel const&, Foam::List<double> const&, Foam::fvPatch const&, Foam::Field<double>&, Foam::Field<double>&) at ??:?
#4  Foam::epsilonWallFunctionFvPatchScalarField::calculateTurbulenceFields(Foam::turbulenceModel const&, Foam::Field<double>&, Foam::Field<double>&) at ??:?
#5  Foam::epsilonWallFunctionFvPatchScalarField::updateCoeffs() at ??:?
#6  Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::Boundary::evaluate() at ??:?
#7  Foam::incompressible::RASModels::LamBremhorstKE::correctNut(Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh> const&) at ??:?
#8  Foam::incompressible::RASModels::LamBremhorstKE::correctNut() at ??:?
#9  ? at ??:?
#10  __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#11  ? at ??:?

李东岳

错误消息提示你的求解器里面没有这个场的声明。

没用过这个求解器，我在simpleFoam/pitzDaily下面测试了一下可以运行

lambs

@东岳老师，是这个volScalarField吗？该怎么声明呢？

李东岳

@lambs 这个算例后来验证的如何了？