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-   -   Face centered or vertex centered (http://www.cfd-online.com/Forums/cfx/26618-face-centered-vertex-centered.html)

tommy November 4, 2008 11:42

Face centered or vertex centered
 
Does Cfx uses a cell-centered or vertex-centered finite volume approach ?

Thank you very much for the attention

Tommaso

CycLone November 4, 2008 12:47

Re: Face centered or vertex centered
 
CFX uses vertex-centered finite volume.

HekLeR November 13, 2008 00:52

Re: Face centered or vertex centered
 
CFX additionally uses finite element shape functions to approximate the profile within the elements. As opposed to a cell centered discretization being applied at each face connecting two mesh vertices.

Or, maybe this is more clear:

You put solution points on the vertex and use either: a cell centered (not sure if a commercial code does this) or a FEM discretization (like CFX). Or, your solution points are at cell centroids and you use a cell centered discretization (like FLUENT for example).

Any of the methods should pretty much give the same answer under a mesh refinement and will also have similar mesh convergence...



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