FV schemes

ala · September 27, 2010, 12:35

Hi all, I have a question. Can i deal in open foam with dual meshes?
I mean, can i also do finite volume discretisation as node (vertex) centered fv scheme? Thanks in advance! Best regards, Alicja

ala · October 14, 2010, 15:14

I know that OpenFoam use collocated grids. But i'm not sure about the FV schemes. Do the finite volume cells agree with mesh cells? Can i also define a finite volume around a vertex (vertex centered) and not around a cell center (cell-centered)? I already looked at the fvMatrix class, and i'm thinking that this is impossible (or hard to do).

thanks!
ala

ala · October 14, 2010, 15:32

I modified a little bit the laplacianFoam in the following way:
- first I read a volScalarField f=1 (right hand side)
- next I modify this volScalarField f within the solver to f=sin( pi x )sin( pi y )
- and last i solve $-\Delta \phi = f$ with constant (equal to 0) Dirichlet BC, with $\phi : \mathbb{R}^n \rightarrow \mathbb{R}$
Is it OK like i did it?
I 've attached the modified solver and the case.

Comments and hints are appreciated!
Greetings,
Ala

ala · October 19, 2010, 17:25

Has nobody a hint or an idea?

Thanks in advance,
Alicja

September 27, 2010, 12:35	FV schemes	#1
ala New Member Alicja M Join Date: Mar 2009 Location: Erlangen, DE Posts: 26 Rep Power: 17	Hi all, I have a question. Can i deal in open foam with dual meshes? I mean, can i also do finite volume discretisation as node (vertex) centered fv scheme? Thanks in advance! Best regards, Alicja

October 19, 2010, 17:25	Please any help is still appreciated!	#4
ala New Member Alicja M Join Date: Mar 2009 Location: Erlangen, DE Posts: 26 Rep Power: 17	Has nobody a hint or an idea? Thanks in advance, Alicja

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October 14, 2010, 15:14		#2
ala New Member Alicja M Join Date: Mar 2009 Location: Erlangen, DE Posts: 26 Rep Power: 17	I know that OpenFoam use collocated grids. But i'm not sure about the FV schemes. Do the finite volume cells agree with mesh cells? Can i also define a finite volume around a vertex (vertex centered) and not around a cell center (cell-centered)? I already looked at the fvMatrix class, and i'm thinking that this is impossible (or hard to do). thanks! ala