CFD Online Logo CFD Online URL
Home > Forums > CFX

negative volume encountered

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

LinkBack Thread Tools Display Modes
Old   March 13, 2008, 00:34
Default negative volume encountered
Posts: n/a

I encountered an error message while i was solving using cfx-solver. i think it might be due to the mesh. Is there any reason for a mesh to becomes negative volume?

I am modelling a cylinder,and what i am thinking is it may be caused by the higher length scale used.Any such problems before? I had copy the error message below.

Thanks, Maga

| ERROR #002100011 has occurred in subroutine cVolSec. | | Message: | | A negative SECTOR volume has been detected. Execution will proceed | | but this is a possible cause of robustness problems. | | The location of the first negative volume is reported below. | | Volume : -0.2421E-14 | | Location : ( -0.99474E-02, 0.28970E+00, -0.39715E+00) | | This warning may be made fatal by setting the expert parameter | | 'negative volume option = 1'.
  Reply With Quote

Old   October 7, 2009, 08:53
Senior Member
Join Date: Oct 2009
Posts: 288
Rep Power: 11
alinik is on a distinguished road
hi maga

have u found a way to overcome ur problem?, coz I am facing it now and I need a solution as soon as possible

thanks ,alinik
alinik is offline   Reply With Quote

Old   October 7, 2009, 17:31
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 14,098
Rep Power: 109
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
You have to debug the mesh motion and find why it is folding the mesh. Do a simulation where you write out the mesh every timestep for a few timesteps before it crashes and you should see where it folds.

Once you have found the location then you need to fix it, but I will wait for your return posting before we go there.
ghorrocks is offline   Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
how to set periodic boundary conditions Ganesh FLUENT 13 January 22, 2014 05:11
channelFoam for a 3D pipe AlmostSurelyRob OpenFOAM 3 June 24, 2011 13:06
BlockMesh FOAM warning gaottino OpenFOAM Native Meshers: blockMesh 7 July 19, 2010 14:11
On the damBreak4phaseFine cases paean OpenFOAM Running, Solving & CFD 0 November 14, 2008 22:14
Axisymmetrical mesh Rasmus Gjesing (Gjesing) OpenFOAM Native Meshers: blockMesh 10 April 2, 2007 14:00

All times are GMT -4. The time now is 15:05.