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-   -   cfx solvers -FVM? (http://www.cfd-online.com/Forums/cfx/19457-cfx-solvers-fvm.html)

derrek February 5, 2003 13:54

cfx solvers -FVM?
 
Is cfx all FVM based?

Robin February 5, 2003 17:53

Re: cfx solvers -FVM?
 
Yes. CFX uses an element based Finite Volume Method.

-Robin

derrek February 6, 2003 07:58

Re: cfx solvers -FVM?
 
The PI sheet for cfx5 states the following "Conservative finite-element based control volume method"

This implies FVM?

Sharks February 7, 2003 19:19

Re: cfx solvers -FVM?
 
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

derrek February 9, 2003 08:50

Re: cfx solvers -FVM?
 
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

Robin February 10, 2003 12:50

Re: cfx solvers -FVM?
 
Hi Derrek,

A control volume is analagous to the finite volume.

Six of one, half a dozen of another.

Regards, Robin


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