Moving mesh problem

Geon-Hong · February 3, 2010, 03:43

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, 23:09

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, 01:44

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, 04:24

Dear ekakavand

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

Sincerely,
Geon-Hong

February 3, 2010, 03:43	Moving mesh problem	#1
Geon-Hong Member Geon-Hong Kim Join Date: Feb 2010 Location: Ulsan, Republic of Korea Posts: 36 Rep Power: 16	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, 23:09		#2
mas New Member Mas Join Date: Jan 2010 Location: Japan Posts: 24 Rep Power: 16	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, 01:44	AMG solver	#3
ekakavand New Member Elahe Join Date: Oct 2009 Posts: 21 Rep Power: 17	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

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April 5, 2010, 04:24		#4
Geon-Hong Member Geon-Hong Kim Join Date: Feb 2010 Location: Ulsan, Republic of Korea Posts: 36 Rep Power: 16	Dear ekakavand Just made grid again and now I have no problem with my computation. Sincerely, Geon-Hong