cfx solvers -FVM?

February 5, 2003, 13:54

Is cfx all FVM based?

February 5, 2003, 17:53

Yes. CFX uses an element based Finite Volume Method.

-Robin

February 6, 2003, 07:58

The PI sheet for cfx5 states the following "Conservative finite-element based control volume method"

This implies FVM?

Mostafa.F.H · February 7, 2003, 19:19

Hi Derrek

CFX-5 uses an unstructured Finite Element based Finite Volume method. The FE basis comes from the use of shape functions, common in FE techniques, to describe the way a variable changes across each element. It is also a node based code, where the solution variables are solved and stored at the centers of the finite volumes, or the vertices of the mesh.

I believe TASCflow employs a similar strategy, except that it can solve on only block-structured hexagonal meshes.

CFX-4 uses a cell-centered Finite Volume/Finite Difference method.

Sharks

February 9, 2003, 08:50

sharks, thanks for the info.

I am not that familiar with the FVM. Still not sure where the finite volume comes into play in regards to cfx4. If it is an unstructured mesh using shape functions, how does it differ from a true FE based solver?

cheers, derrek

aero_head · February 10, 2003, 12:50

Hi Derrek,

A control volume is analagous to the finite volume.

Six of one, half a dozen of another.

Regards, Robin

February 5, 2003, 13:54	cfx solvers -FVM?	#1
derrek Guest Posts: n/a	Is cfx all FVM based?

February 5, 2003, 17:53	Re: cfx solvers -FVM?	#2
Robin Guest Posts: n/a	Yes. CFX uses an element based Finite Volume Method. -Robin

February 6, 2003, 07:58	Re: cfx solvers -FVM?	#3
derrek Guest Posts: n/a	The PI sheet for cfx5 states the following "Conservative finite-element based control volume method" This implies FVM?

February 7, 2003, 19:19	Re: cfx solvers -FVM?	#4
Sharks Guest Posts: n/a	Hi Derrek CFX-5 uses an unstructured Finite Element based Finite Volume method. The FE basis comes from the use of shape functions, common in FE techniques, to describe the way a variable changes across each element. It is also a node based code, where the solution variables are solved and stored at the centers of the finite volumes, or the vertices of the mesh. I believe TASCflow employs a similar strategy, except that it can solve on only block-structured hexagonal meshes. CFX-4 uses a cell-centered Finite Volume/Finite Difference method. Sharks Mostafa.F.H and aero_head like this.

February 9, 2003, 08:50	Re: cfx solvers -FVM?	#5
derrek Guest Posts: n/a	sharks, thanks for the info. I am not that familiar with the FVM. Still not sure where the finite volume comes into play in regards to cfx4. If it is an unstructured mesh using shape functions, how does it differ from a true FE based solver? cheers, derrek

February 10, 2003, 12:50	Re: cfx solvers -FVM?	#6
Robin Guest Posts: n/a	Hi Derrek, A control volume is analagous to the finite volume. Six of one, half a dozen of another. Regards, Robin aero_head likes this.

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