Neumann boundary conditions

Cyp · October 26, 2010, 05:02

Hi Herbert!

Indeed I want to edit the BC for p from the BC of U (in the case of a two-phase Darcy law)

herbert · October 26, 2010, 06:47

Okay,

I was just confused because of your nomenclature...

mrshb4 · September 7, 2011, 17:48

Dear Firends!!!

I used refCast for temperture filed like this;

label patchID = mesh.boundaryMesh().findPatchID("right");
-------------------------------------------------------------------------------------------------------------
fixedGradientFvPatchScalarField& gradUPatch=refCast<fixedGradientFvPatchScalarField >(T.boundaryField()[patchID]);
scalarField& gradUField = gradUPatch.gradient();

but during compilation faced this error:
================================================== =========
solveEnergy.H:78: error: ‘fixedGradientFvPatchField’ was not declared in this scope
solveEnergy.H:78: error: ‘gradUPatch’ was not declared in this scope
solveEnergy.H:78: error: ‘fixedGradientFvPatchField’ cannot appear in a constant-expression
solveEnergy.H:78: error: no matching function for call to ‘refCast(Foam::fvPatchField<double>&)’
================================================== =========

I also add this to my header but still have error
# include "fixedGradientFvPatchFields.H"

I use fixedValue in the same way in my code but no error would occur and everything works fine!!!

what's the problem?!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
mesh file for flow over a circular cylinder	Ardalan	Main CFD Forum	7	December 15, 2020 13:06
Impinging Jet Boundary Conditions	Anindya	Main CFD Forum	25	February 27, 2016 12:58
Concentric tube heat exchanger (Air-Water)	Young	CFX	5	October 6, 2008 23:17
Pressure boundary conditions	Lionel S.	Main CFD Forum	1	August 24, 2007 18:03
[Commercial meshers] Trimmed cell and embedded refinement mesh conversion issues	michele	OpenFOAM Meshing & Mesh Conversion	2	July 15, 2005 04:15

October 26, 2010, 05:02		#21
Cyp Senior Member Cyprien Join Date: Feb 2010 Location: Stanford University Posts: 299 Rep Power: 18	Hi Herbert! Indeed I want to edit the BC for p from the BC of U (in the case of a two-phase Darcy law)

October 26, 2010, 06:47		#22
herbert Senior Member Stefan Herbert Join Date: Dec 2009 Location: Darmstadt, Germany Posts: 129 Rep Power: 17	Okay, I was just confused because of your nomenclature...

September 7, 2011, 17:48		#23
mrshb4 Member Mohammad.R.Shetab Join Date: Jul 2010 Posts: 49 Rep Power: 15	Dear Firends!!! I used refCast for temperture filed like this; label patchID = mesh.boundaryMesh().findPatchID("right"); ------------------------------------------------------------------------------------------------------------- fixedGradientFvPatchScalarField& gradUPatch=refCast<fixedGradientFvPatchScalarField >(T.boundaryField()[patchID]); scalarField& gradUField = gradUPatch.gradient(); but during compilation faced this error: ================================================== ========= solveEnergy.H:78: error: ‘fixedGradientFvPatchField’ was not declared in this scope solveEnergy.H:78: error: ‘gradUPatch’ was not declared in this scope solveEnergy.H:78: error: ‘fixedGradientFvPatchField’ cannot appear in a constant-expression solveEnergy.H:78: error: no matching function for call to ‘refCast(Foam::fvPatchField<double>&)’ ================================================== ========= I also add this to my header but still have error # include "fixedGradientFvPatchFields.H" I use fixedValue in the same way in my code but no error would occur and everything works fine!!! what's the problem?!