CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Moving mesh problem

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 3, 2010, 03:43
Default Moving mesh problem
  #1
Member
 
Geon-Hong Kim
Join Date: Feb 2010
Location: Ulsan, Republic of Korea
Posts: 36
Rep Power: 16
Geon-Hong is on a distinguished road
I tried to analyze a shrouded propeller with moving mesh.

I tested FLUENT 6.3 under both x64 CentOS Linux and WinXP professional edition(32bit).

After I set up the problem to solve it with moving mesh, I checked the grid but no problem was occurred.

However, when I started to iterate with unsteady solver, then I encountered following error messages...

Code:
WARNING: non-positive volumes exist.

divergence detected in AMG solver: pressure correction

Primitive Error at Node 5: floating point exception
Why this happened? Please somebody help me...TT

I also tried to solve the problem with same setting but stationary mesh, there was no problem like this at all.

When I set an moving mesh for an open propeller, there was no problem too.

Why this happened and what should I do?
Geon-Hong is offline   Reply With Quote

Old   February 3, 2010, 23:09
Default
  #2
mas
New Member
 
Mas
Join Date: Jan 2010
Location: Japan
Posts: 24
Rep Power: 16
mas is on a distinguished road
for the non-positive volumes problem, you should check your remeshing settings, eg. min/max length scale and size remesh interval.
__________________
<Mas>
mas is offline   Reply With Quote

Old   February 7, 2010, 01:44
Default AMG solver
  #3
New Member
 
Elahe
Join Date: Oct 2009
Posts: 21
Rep Power: 16
ekakavand is on a distinguished road
Hi Geon

did you solve your problem? I countered with this error too, I change factors of solve but i do not get results.

thanks in advance.
elahe
ekakavand is offline   Reply With Quote

Old   April 5, 2010, 04:24
Default
  #4
Member
 
Geon-Hong Kim
Join Date: Feb 2010
Location: Ulsan, Republic of Korea
Posts: 36
Rep Power: 16
Geon-Hong is on a distinguished road
Dear ekakavand

Just made grid again and now I have no problem with my computation.

Sincerely,
Geon-Hong
Geon-Hong is offline   Reply With Quote

Reply

Tags
moving mesh, non-positive volumes

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
problem when converting mesh (made by ICEM) using fluentMeshToFoam Forrest_Lei OpenFOAM 11 October 16, 2009 07:28
problem related to mesh naveen CFX 3 March 25, 2006 09:47
How to control Minximum mesh space? hung FLUENT 7 April 18, 2005 10:38
Moving Mesh problem Sabe Siemens 0 February 12, 2004 08:41
Moving mesh problem Jan Majer Siemens 2 June 10, 2003 05:19


All times are GMT -4. The time now is 06:48.