Moving mesh problem

Geon-Hong · February 3, 2010, 02:43

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?

mas · February 3, 2010, 22:09

for the non-positive volumes problem, you should check your remeshing settings, eg. min/max length scale and size remesh interval.

ekakavand · February 7, 2010, 00:44

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

Geon-Hong · April 5, 2010, 03:24

Dear ekakavand

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

Sincerely,
Geon-Hong

February 3, 2010, 02:43	Moving mesh problem	#1
Geon-Hong Member Geon-Hong Kim Join Date: Feb 2010 Location: Ulsan, Republic of Korea Posts: 33 Rep Power: 15	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?

February 3, 2010, 22:09		#2
mas New Member Mas Join Date: Jan 2010 Location: Japan Posts: 24 Rep Power: 15	for the non-positive volumes problem, you should check your remeshing settings, eg. min/max length scale and size remesh interval. __________________ <Mas>

February 7, 2010, 00:44	AMG solver	#3
ekakavand New Member Elahe Join Date: Oct 2009 Posts: 21 Rep Power: 15	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

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
problem when converting mesh (made by ICEM) using fluentMeshToFoam	Forrest_Lei	OpenFOAM	11	October 16, 2009 06:28
problem related to mesh	naveen	CFX	3	March 25, 2006 08:47
How to control Minximum mesh space?	hung	FLUENT	7	April 18, 2005 09:38
Moving Mesh problem	Sabe	Siemens	0	February 12, 2004 07:41
Moving mesh problem	Jan Majer	Siemens	2	June 10, 2003 04:19

April 5, 2010, 03:24		#4
Geon-Hong Member Geon-Hong Kim Join Date: Feb 2010 Location: Ulsan, Republic of Korea Posts: 33 Rep Power: 15	Dear ekakavand Just made grid again and now I have no problem with my computation. Sincerely, Geon-Hong