Fluent Mesh read error

abhinavgupta88 · July 3, 2011, 02:43

Hi,I created the mesh for Airfoil in Gambit and when I am trying to read it in FLUENT it gives me an error i.e. Cannot change gap-interior to interior because
there is only one adjacent cell thread. I have a tip clearance region in the geometry. and I defined the void region surfaces as interior. Can someone please tell me that How shall I define the faces. Thank you.

-mAx- · July 4, 2011, 02:36

Sounds like a connectivity problem (explained with "One adjacent cell thread").
Back to Gambit and connect all your surfaces (3d) or edges (2d).
And remesh (if necessary)

abhinavgupta88 · July 7, 2011, 10:04

Thanks Max,
Yes there was the connectivity problem. I edited the mesh, but still there is some problem in the Inlet and the Gap Volume. I hope I have problem because I am defining the Gap volume as interior in GAMBIT. I am using the fuse command to fuse the zones downstream and I have periodic boundary conditions. I will try changing the Mesh once more.

-mAx- · July 7, 2011, 10:26

I could understand why you want to define any surface as interior (although you don't have to), but I don't understand why you try to define a volume as interior.
Anyway you cannot define a BC on a volume, except for porous zone, laminar zone etc... but the set up occures in a different panel than BC

abhinavgupta88 · July 7, 2011, 13:25

Hi..
Sorry for my language. Here is the description. I made a grid for an airfoil. I created a 3D Mesh successfully. Then I needed a Casing at the top. I used the cooper tool for to create that it was created successfully. Now in that Gap region just above the Airfoil there is an interior i.e. the gap region. I defined that region as interior not the volume. WHen I read that mesh in Fluent it gave me an error. Than I defined the zones again and made them as wall and took them to fluent. This time it did not give me an error. Now after that I defined the periodic zones and the appropriate wall zones to interior. It worked but after running one time step when I am looking at a the gap region there is a velocity profile but there is no velocity profile on the symmetry. I dont understand why it is happening.

-mAx- · July 8, 2011, 11:05

you don't have to define any region as interior.
Any meshed volume is automatically treated as fluid domain (except if you define a volume as porous, solid, etc...)
Post a picture of your stuff

abhinavgupta88 · July 8, 2011, 21:37

Thanks Max. I figured out the problem. You were right. I was defining wrong zones as interiors. My simulation worked fine.

July 3, 2011, 02:43	Fluent Mesh read error	#1
abhinavgupta88 New Member Abhinav Join Date: Mar 2011 Posts: 17 Rep Power: 15	Hi,I created the mesh for Airfoil in Gambit and when I am trying to read it in FLUENT it gives me an error i.e. Cannot change gap-interior to interior because there is only one adjacent cell thread. I have a tip clearance region in the geometry. and I defined the void region surfaces as interior. Can someone please tell me that How shall I define the faces. Thank you.

July 4, 2011, 02:36		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	Sounds like a connectivity problem (explained with "One adjacent cell thread"). Back to Gambit and connect all your surfaces (3d) or edges (2d). And remesh (if necessary) __________________ In memory of my friend Hervé: CFD engineer & freerider

July 7, 2011, 10:26		#4
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	I could understand why you want to define any surface as interior (although you don't have to), but I don't understand why you try to define a volume as interior. Anyway you cannot define a BC on a volume, except for porous zone, laminar zone etc... but the set up occures in a different panel than BC __________________ In memory of my friend Hervé: CFD engineer & freerider

July 8, 2011, 11:05		#6
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	you don't have to define any region as interior. Any meshed volume is automatically treated as fluid domain (except if you define a volume as porous, solid, etc...) Post a picture of your stuff __________________ In memory of my friend Hervé: CFD engineer & freerider

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[OpenFOAM] Native ParaView Reader Bugs	tj22	ParaView	270	January 4, 2016 12:39
CGNS Compiling	Diego	Main CFD Forum	17	December 21, 2014 02:40
Moving mesh	Niklas Wikstrom (Wikstrom)	OpenFOAM Running, Solving & CFD	122	June 15, 2014 07:20
UDF: DEFINE_CG_MOTION for vertical jump motion of an electrode!	alban	Fluent UDF and Scheme Programming	2	June 8, 2010 19:54
compile errors of boundary condition "expDirectionMixed"	liying02ts	OpenFOAM Bugs	2	February 1, 2010 21:11

July 7, 2011, 10:04		#3
abhinavgupta88 New Member Abhinav Join Date: Mar 2011 Posts: 17 Rep Power: 15	Thanks Max, Yes there was the connectivity problem. I edited the mesh, but still there is some problem in the Inlet and the Gap Volume. I hope I have problem because I am defining the Gap volume as interior in GAMBIT. I am using the fuse command to fuse the zones downstream and I have periodic boundary conditions. I will try changing the Mesh once more.

July 7, 2011, 13:25		#5
abhinavgupta88 New Member Abhinav Join Date: Mar 2011 Posts: 17 Rep Power: 15	Hi.. Sorry for my language. Here is the description. I made a grid for an airfoil. I created a 3D Mesh successfully. Then I needed a Casing at the top. I used the cooper tool for to create that it was created successfully. Now in that Gap region just above the Airfoil there is an interior i.e. the gap region. I defined that region as interior not the volume. WHen I read that mesh in Fluent it gave me an error. Than I defined the zones again and made them as wall and took them to fluent. This time it did not give me an error. Now after that I defined the periodic zones and the appropriate wall zones to interior. It worked but after running one time step when I am looking at a the gap region there is a velocity profile but there is no velocity profile on the symmetry. I dont understand why it is happening.

July 8, 2011, 21:37		#7
abhinavgupta88 New Member Abhinav Join Date: Mar 2011 Posts: 17 Rep Power: 15	Thanks Max. I figured out the problem. You were right. I was defining wrong zones as interiors. My simulation worked fine.