各位老师好，我最近在尝试定义一个新的边界条件，结合timeVaryingMappedFixedValue和inletOutelt边界。在每个时间步对边界插值赋值之后，再根据边界上的通量判断入流/出流，将出流的区域设置zeroGradient，而入流区域仍采用插值结果。
下面是我参考inletOutlet边界文件修改的updateCoeffs()函数:
template<class Type>
void Foam::timeVaryingInletOutletFvPatchField<Type>::updateCoeffs()
{
if (this->updated())
{
return;
}
this->operator==(fieldMapper_.map());
// 拷贝于‘inletOutlet’边界源文件，用于判断方向并对系数赋值
const Field<scalar>& phip =
this->patch().template lookupPatchField<surfaceScalarField, scalar>
(
phiName_
);
this->valueFraction() = 1.0 - pos0(phip);
//
fixedValueFvPatchField<Type>::updateCoeffs();
}
新的边界条件能够成功编译。但在进行测试case（pimpleFoam）时，会在decomposePar分解并行区域步骤报错（直接进行单核计算也会出现相同错误）：
--> FOAM FATAL ERROR:
request for surfaceScalarField phi from objectRegistry region0 failed
available objects of type surfaceScalarField are 0()
From function const Type& Foam::objectRegistry::lookupObject(const Foam::word&) const [with Type = Foam::GeometricField<double, Foam::fvsPatchField, Foam::surfaceMesh>] in file /home/gareth/OpenFOAM/OpenFOAM-8/src/OpenFOAM/lnInclude/objectRegistryTemplates.C at line 211.
以下是objectRegistryTemplates.C文件的对应内容：
FatalErrorInFunction
<< nl
<< " request for " << Type::typeName
<< " " << name << " from objectRegistry " << this->name()
<< " failed\n available objects of type " << Type::typeName
<< " are" << nl
<< names<Type>();
if (cacheTemporaryObject(name))
{
FatalErrorInFunction
<< nl
<< " request for " << name << " from objectRegistry "
<< this->name() << " to be cached failed" << nl
<< " available temporary objects are" << nl
<< temporaryObjects_;
}
FatalErrorInFunction // line 211
<< abort(FatalError); // line 212
}
return NullObjectRef<Type>();
根据错误信息，似乎是没有找到surfaceScalarField类型的对象phi，但我只是结合inletOutlet边界，对原始的timeVaryingMappedFixedValue边界代码进行修改，并未改变其他源代码部分。并且我检查了求解器createFields.H，包含对通量phi的创建。所以我很困惑这个问题是如何产生的？
我是刚开始接触OpenFOAM的源代码，可能犯了一些愚蠢的错误。希望各位大佬能对该问题给出一些建议。 谢谢！
