problem with skewness

jjchristophe · January 13, 2010, 03:24

I have to hold cfd analysis with extracted geometry.
geometry is extracted and surface mesh is created under Mimics, then the volume mesh is generated under gridgen.
Under Mimics, the coefficient of skewness (i mean for the triangles' angles) is over 0.4, which mean under 0.6 for fluent (under mimics, skewness is equal to 1-(skewness coefficient under fluent)). under Gridgen, when I generate the mesh, I set the maximum skewness at 0.7.
thing is, under fluent, when I check the case, it says that skewness exceed 0.98 for some elements.
Is it normal?
Is there anyway to fix that?

jjchristophe · January 14, 2010, 22:22

anybody knows if I should use the SIMPLEC algorithm with a skewness correction, and in the case, for 22 cells exceeding 0.98 for the skewness, should I set 22 for the skewness correction?

January 13, 2010, 03:24	problem with skewness	#1
jjchristophe New Member christophe Join Date: Aug 2009 Posts: 24 Rep Power: 17	I have to hold cfd analysis with extracted geometry. geometry is extracted and surface mesh is created under Mimics, then the volume mesh is generated under gridgen. Under Mimics, the coefficient of skewness (i mean for the triangles' angles) is over 0.4, which mean under 0.6 for fluent (under mimics, skewness is equal to 1-(skewness coefficient under fluent)). under Gridgen, when I generate the mesh, I set the maximum skewness at 0.7. thing is, under fluent, when I check the case, it says that skewness exceed 0.98 for some elements. Is it normal? Is there anyway to fix that?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
UDF compiling problem	Wouter	Fluent UDF and Scheme Programming	6	June 6, 2012 05:43
Incoherent problem table in hollow-fiber spinning	Gianni	FLUENT	0	April 5, 2008 11:33
natural convection problem for a CHT problem	Se-Hee	CFX	2	June 10, 2007 07:29
Adiabatic and Rotating wall (Convection problem)	ParodDav	CFX	5	April 29, 2007 20:13
Is this problem well posed?	Thomas P. Abraham	Main CFD Forum	5	September 8, 1999 15:52

January 14, 2010, 22:22		#2
jjchristophe New Member christophe Join Date: Aug 2009 Posts: 24 Rep Power: 17	anybody knows if I should use the SIMPLEC algorithm with a skewness correction, and in the case, for 22 cells exceeding 0.98 for the skewness, should I set 22 for the skewness correction?