Symmetry or Axis B.C ??

L. Hamid · March 13, 2011, 04:07

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?

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, 07:27

how can i create an axis bc? i´m 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?

March 13, 2011, 04:07	Symmetry or Axis B.C ??	#1
L. Hamid Member Hamid Join Date: Dec 2010 Location: Iran Posts: 30 Rep Power: 15	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?

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March 13, 2011, 06:50		#2
azt Member allan thomson Join Date: Mar 2009 Location: scotland Posts: 45 Rep Power: 17	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

May 20, 2011, 07:27		#3
fipellac New Member Filippo Pellacani Join Date: Jul 2010 Location: München Posts: 13 Rep Power: 16	how can i create an axis bc? i´m 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?