very important question, please

hamid1 · February 8, 2012, 05:59

Hi

how can we test and be sure mesh is correct in terms of skewness?
i meshes my model and it has 75% of mesh between .9 and .95,
how can i fix it? the mesh is tetrahedral and i can not make it finer..

-mAx- · February 8, 2012, 07:13

in Fluent do a check mesh >> http://my.fit.edu/itresources/manual...ug/node827.htm

in Gambit you can examine your mesh with http://my.fit.edu/itresources/manual....htm#gc_exmesh
In Gambit you can display all elements which skewness is between your 2 values, by entering values in "lower" and "upper" limits (range)

hamid1 · February 8, 2012, 07:26

thanks for reply,
i actually use icem,
my question is the criteria, what is the criteria or role of thumb for that?
if my skewness is less than .98 then is it acceptable??
for my model:
75% skewness .9 to .95
0.5% .95 to 1

when i fine the mesh the skewness become even worst,
plz let me know..

-mAx- · February 8, 2012, 07:31

ask icem people on http://www.cfd-online.com/Forums/ansys-meshing/
Personnaly I always try to get a mesh with max skewness <= 0.9 (tetra)

February 8, 2012, 05:59	very important question, please	#1
hamid1 Senior Member hamid Join Date: Nov 2010 Posts: 185 Rep Power: 15	Hi how can we test and be sure mesh is correct in terms of skewness? i meshes my model and it has 75% of mesh between .9 and .95, how can i fix it? the mesh is tetrahedral and i can not make it finer..

February 8, 2012, 07:13		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	in Fluent do a check mesh >> http://my.fit.edu/itresources/manual...ug/node827.htm in Gambit you can examine your mesh with http://my.fit.edu/itresources/manual....htm#gc_exmesh In Gambit you can display all elements which skewness is between your 2 values, by entering values in "lower" and "upper" limits (range) __________________ In memory of my friend Hervé: CFD engineer & freerider

February 8, 2012, 07:31		#4
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	ask icem people on http://www.cfd-online.com/Forums/ansys-meshing/ Personnaly I always try to get a mesh with max skewness <= 0.9 (tetra) __________________ In memory of my friend Hervé: CFD engineer & freerider

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
question about uds	tanven	FLUENT	2	July 5, 2015 11:22
General Question: Inlet- Outlet Mesh - have to be simular?	thisisit	FLUENT	8	July 11, 2011 11:26
internal field question - PitzDaily Case	atareen64	OpenFOAM Running, Solving & CFD	2	January 26, 2011 15:26
Question about Table applicaiton.	universez	OpenFOAM Running, Solving & CFD	0	January 12, 2010 20:31
Poisson Solver question	Suresh	Main CFD Forum	3	August 12, 2005 04:37

February 8, 2012, 07:26		#3
hamid1 Senior Member hamid Join Date: Nov 2010 Posts: 185 Rep Power: 15	thanks for reply, i actually use icem, my question is the criteria, what is the criteria or role of thumb for that? if my skewness is less than .98 then is it acceptable?? for my model: 75% skewness .9 to .95 0.5% .95 to 1 when i fine the mesh the skewness become even worst, plz let me know..