CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Rigid sphere falling through air. Dynamic mesh

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   June 23, 2010, 09:28
Default Rigid sphere falling through air. Dynamic mesh
New Member
Alexander Meier
Join Date: Apr 2010
Posts: 8
Rep Power: 15
alexmeier is on a distinguished road
Hi there

I'm trying to set up a problem in fluent.
I'd like to simulate a rigid sphere falling through air at standard conditions accelerated by gravity onely using a dynamic mesh and UDFs.
right now my problem is, that fluent can't read my mesh. I always get the same Error warning:

WARNING: cell 2 of thread 15 has NULL face pointer 3
ERROR: Build Grid: Aborted due to critical error.

Here is the mesh I wanted to use:

There is a region around the Sphere I have declared as new volume part when I have created the prism Layers. The reason for this is, that I want to move the boundary Layer and the Sphere in my simulation.

I have checked what happens, when I try to read in the same mesh in fluent, whiteout declaring the boundary Layer as new volume part. If i do so, there is no ERROR Warning.

For this reason I know, that there is something wrong whit this volume part declaration. but right now I can't think of any other possibility to realize my simulation.

Does anybody know what's wrong?

the Fluent User Manual says:

"If you create a single grid with multiple cell zones, you must be sure that each cell zone has a distinct face zone on the sliding boundary. The face zones for two adjacent cell zones will have the same position and shape, but one will correspond to one cell zone and one to the other."

I think that' why this ERROR occurs. But I don't understand how to realize this in ICEM?

Is there any other possibility to realize this Problem in Fluent?

thank you so much for your support.

Last edited by alexmeier; June 23, 2010 at 10:14.
alexmeier is offline   Reply With Quote


dynamic mesh, fluent 12.0, ufd

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Dynamic Mesh Problem. Tom Clark FLUENT 10 June 21, 2021 04:27
Dynamic Mesh on Pintle type injector. herntan FLUENT 16 September 4, 2020 08:27
[snappyHexMesh] SnappyHexMesh for internal Flow vishwa OpenFOAM Meshing & Mesh Conversion 24 June 27, 2016 08:54
air bubble is disappear increasing time using vof xujjun CFX 9 June 9, 2009 07:59
Dynamic mesh Phil FLUENT 1 June 15, 2003 04:57

All times are GMT -4. The time now is 06:41.