Undeseriable surface in CFX

Barzanoni · May 22, 2013, 08:11

hi everybody

i made a cone for inlet of a power turbine with ICEM, after meshing, i read it from CFX, but when CFX read it, in the geometery, I have some unknown surfaces and area that i didn't produce them. i made my geo with various method, but the problem is still alive.
of course, i export my mesh from ICEM with Fluent type file, but Fluent cant read it!!!!
if anybody know about them, please help me.

thanks a lot.

ghorrocks · May 22, 2013, 08:20

Sounds like a problem with setting up the surfaces in ICEM. I would load the mesh in ICEM and fix the boundary surfaces up.

Barzanoni · May 25, 2013, 06:59

thank you ghorrocks, but i dont understand what are you doing, whould you please explain for me more?!
the geometery have no fault in the ICEM, but when read it in the CFX the problem come in.
thank you

mat_cfd · May 25, 2013, 08:14

U should use AnsysCFX as solver for export from icem to Cfx . Why u r using Fluent type file for export

Barzanoni · May 26, 2013, 03:42

hi mat
i do this and use CFX solver, but some undesirible surface and area were made on the geometery.
Also, when i used the Fluent_V6 solver, the exporting file dont read by CFX and Fluent.

thank you

mat_cfd · May 27, 2013, 03:47

Use AnsysCFX as solver for export in icem and when u import file in CFX pre use ICEMCFD in drop down menu of mesh format. It should work fine.
Also only mesh goes from ICEM CFD to CFX. If u see any undesirable surface in CFX it is geeting meshed in ICEMCFD. Zoom in zoom out fit view to check geometry in ICEM CFD for any unwanted surface.

Barzanoni · May 28, 2013, 04:39

Hi Dear

i do all you say, but the problem is on th etable!!!

in ICEM, i draw two curves, then rotate them about an axis, made surface and body, after that i mesh it. anything is ok in ICEM, but i CFX .....

sincerely yours.

ghorrocks · May 28, 2013, 07:13

And what is wrong with the image you posted?

Barzanoni · June 1, 2013, 03:04

Hi.
there are a lot of surfaces on the main(s) surface.
On the outlet boundary, for example, CFX divide the boundary in two zone, one is, some thing like as orthogonal mesh and one is rest of the boundary. when you want define the boundaries, you must select two or more surfaces for one boundary.

ghorrocks · June 1, 2013, 07:11

This might be just a CFX-Pre display thing or it could be you defined the surface to be patch work like this.

Barzanoni · June 9, 2013, 01:02

hi
when i want to specify boundary conditions, i must choose two surfaces for one boundary, whereas i have only one surface, and additional surf was created by CFX.
in any way, thank you for your attantion.

Barzanoni · June 10, 2013, 00:53

do anybody have some idea about this?

May 22, 2013, 08:11	Undeseriable surface in CFX	#1
Barzanoni New Member Yaser Join Date: May 2013 Location: I. R. Iran, Tehran Posts: 20 Rep Power: 13	hi everybody i made a cone for inlet of a power turbine with ICEM, after meshing, i read it from CFX, but when CFX read it, in the geometery, I have some unknown surfaces and area that i didn't produce them. i made my geo with various method, but the problem is still alive. of course, i export my mesh from ICEM with Fluent type file, but Fluent cant read it!!!! if anybody know about them, please help me. thanks a lot.

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May 22, 2013, 08:20		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	Sounds like a problem with setting up the surfaces in ICEM. I would load the mesh in ICEM and fix the boundary surfaces up.

May 25, 2013, 06:59		#3
Barzanoni New Member Yaser Join Date: May 2013 Location: I. R. Iran, Tehran Posts: 20 Rep Power: 13	thank you ghorrocks, but i dont understand what are you doing, whould you please explain for me more?! the geometery have no fault in the ICEM, but when read it in the CFX the problem come in. thank you

May 25, 2013, 08:14		#4
mat_cfd New Member Join Date: Oct 2011 Posts: 20 Rep Power: 15	U should use AnsysCFX as solver for export from icem to Cfx . Why u r using Fluent type file for export

May 26, 2013, 03:42		#5
Barzanoni New Member Yaser Join Date: May 2013 Location: I. R. Iran, Tehran Posts: 20 Rep Power: 13	hi mat i do this and use CFX solver, but some undesirible surface and area were made on the geometery. Also, when i used the Fluent_V6 solver, the exporting file dont read by CFX and Fluent. thank you

May 27, 2013, 03:47		#6
mat_cfd New Member Join Date: Oct 2011 Posts: 20 Rep Power: 15	Use AnsysCFX as solver for export in icem and when u import file in CFX pre use ICEMCFD in drop down menu of mesh format. It should work fine. Also only mesh goes from ICEM CFD to CFX. If u see any undesirable surface in CFX it is geeting meshed in ICEMCFD. Zoom in zoom out fit view to check geometry in ICEM CFD for any unwanted surface.

May 28, 2013, 07:13		#8
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	And what is wrong with the image you posted?

June 1, 2013, 03:04		#9
Barzanoni New Member Yaser Join Date: May 2013 Location: I. R. Iran, Tehran Posts: 20 Rep Power: 13	Hi. there are a lot of surfaces on the main(s) surface. On the outlet boundary, for example, CFX divide the boundary in two zone, one is, some thing like as orthogonal mesh and one is rest of the boundary. when you want define the boundaries, you must select two or more surfaces for one boundary.

June 1, 2013, 07:11		#10
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	This might be just a CFX-Pre display thing or it could be you defined the surface to be patch work like this.

June 9, 2013, 01:02		#11
Barzanoni New Member Yaser Join Date: May 2013 Location: I. R. Iran, Tehran Posts: 20 Rep Power: 13	hi when i want to specify boundary conditions, i must choose two surfaces for one boundary, whereas i have only one surface, and additional surf was created by CFX. in any way, thank you for your attantion.

June 10, 2013, 00:53		#12
Barzanoni New Member Yaser Join Date: May 2013 Location: I. R. Iran, Tehran Posts: 20 Rep Power: 13	do anybody have some idea about this?