[hrhm_04]

Hello friends, I looked into the code for basic averaging method. The code for function average() uses updateGrad() and reading updateGrad() says it calculates the gradient of the given field (not the average). can anybody enlighten me?

https://cpp.openfoam.org/v5/Averagin...ce.html#l00033

template<class Type>
  119 void Foam::AveragingMethod<Type>::average()
  120 {
  121     updateGrad();
  122 }

https://cpp.openfoam.org/v5/Basic_8C_source.html#l00093

template<class Type>
   67 void Foam::AveragingMethods::Basic<Type>::updateGrad()
   68 {
   69     GeometricField<Type, fvPatchField, volMesh> tempData
   70     (
   71         IOobject
   72         (
   73             "BasicAverage::Data",
   74             this->mesh_,
   75             IOobject::NO_READ,
   76             IOobject::NO_WRITE,
   77             false
   78         ),
   79         this->mesh_,
   80         dimensioned<Type>("zero", dimless, Zero),
   81         zeroGradientFvPatchField<Type>::typeName
   82     );
   83     tempData.primitiveFieldRef() = data_;
   84     tempData.correctBoundaryConditions();
   85     dataGrad_ = fvc::grad(tempData)->primitiveField();
   86 }