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-   -   Symmetry or Axis B.C ?? (http://www.cfd-online.com/Forums/main/86042-symmetry-axis-b-c.html)

L. Hamid March 13, 2011 04:07

Symmetry or Axis B.C ??
 
what is the difference between symmetry and Axis boundary condition? I mean that in the symmetric geometry when we use symmetry or Axis Boundary condition? :confused:

azt March 13, 2011 06:50

Hi

with a symmetry bc, it is assumed that fluid does not cross the boundary, axis symmetric bc it can.

Think about it as a circular pipe, if the fluid has a swirl or tangential component then one cannot use a symmetric bc you must use axis symmetric.

allan

fipellac May 20, 2011 06:27

how can i create an axis bc? im not able to import a mesh created in icem into cfx pre where the 2d region axis is present, even if is was created as single part in icem cfd.

any ideas/solutions?


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