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negative cell volume detected (dynamic mesh analysis) |
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January 2, 2012, 22:10 |
negative cell volume detected (dynamic mesh analysis)
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#1 |
Member
noken
Join Date: Nov 2011
Posts: 32
Rep Power: 15 |
dear all of FLUENT user
i think i'm facing a problem now with my dynamic mesh analysis simulation, i dont know why but this error come almost in my simulation. did i do something wrong please need your help, here is some crop picture of my simulation... |
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January 3, 2012, 19:53 |
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#2 |
New Member
Join Date: Dec 2011
Posts: 10
Rep Power: 14 |
Your moving mesh set up is not well defined.
After a number of iterations, cells get negative volumes=> remeshing due to your moving mesh creates bad cells and Fluent cannot follow the simulation. Make a preview of the deforming mesh motion if you can or verify where the bad cells are to understand where the moving part of your geometry is creaing bad cells. |
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January 3, 2012, 22:49 |
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#3 |
Member
noken
Join Date: Nov 2011
Posts: 32
Rep Power: 15 |
thanks for the reply bigben, but i'm newbie in moving mesh simulation, would you tell me about how to do that??
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January 4, 2012, 19:54 |
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#4 |
New Member
Join Date: Dec 2011
Posts: 10
Rep Power: 14 |
There are 3 differents moving mesh. Which one are you using: Remeshing/deforming/layering?
Give me your email, I may have some pictures showing how to do it. |
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May 13, 2012, 09:37 |
negative cell volume detected during mesh motion preview
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#5 |
New Member
rauf
Join Date: May 2012
Posts: 3
Rep Power: 14 |
hi.. I am having the same problem like those other guys above there...can u help me how to solve the problem? i was doing a simulation of compression until expansion stroke in combustion chamber of SI engine
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May 13, 2012, 18:10 |
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#6 |
New Member
Join Date: Dec 2011
Posts: 10
Rep Power: 14 |
which deplacement do you have? Which kind of cells do you have?
make a picture of you have and what kind of deplacement you want on it to give me an idea |
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May 14, 2012, 02:39 |
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#7 | |
New Member
rauf
Join Date: May 2012
Posts: 3
Rep Power: 14 |
Quote:
please help me..i am doing this analysis for my undergraduate project thanks |
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May 15, 2012, 07:09 |
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#8 |
New Member
Join Date: Dec 2011
Posts: 10
Rep Power: 14 |
Reffering to ur picture, ur mesh is purely hexa/quad, only layering can be applied starting at the botom of the "Piston".
Did you mesh the piston thickness? (just for understanding) If you want to remesh your volume, you need to mesh it in tetra and not in quad. So what did you do? When is the error appearing? |
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February 20, 2013, 09:43 |
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#9 |
New Member
Join Date: Feb 2013
Posts: 1
Rep Power: 0 |
Hey Bigben.......here s my email id...jameil.sk@gmail.com
Can u send me some screen shots of how to make the remeshing,layering and smoothening work?? |
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August 23, 2013, 06:15 |
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#10 | |
New Member
sugumar vigneshwaran
Join Date: Aug 2013
Location: Coimbatore, Tamilnadu, India
Posts: 1
Rep Power: 0 |
Quote:
suguaspire@gmail.com Thank you |
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April 5, 2015, 23:15 |
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#11 |
Member
sanjeet Limbu
Join Date: Mar 2015
Posts: 91
Rep Power: 11 |
I am facing issue of negative volume
i am using 2D planer mode - for compression stroke simulation : so the piston line - boundary move to compless inside fluid using the UDF |
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March 28, 2016, 04:11 |
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#12 |
New Member
Arif Shafiq
Join Date: Dec 2014
Posts: 11
Rep Power: 11 |
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June 26, 2016, 15:08 |
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#13 | |
New Member
ronnie wang
Join Date: Jan 2016
Posts: 10
Rep Power: 10 |
Quote:
I am having the same dynamic mesh problem too. Best regard Ronnie sdsuronnie@gmail.com |
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July 25, 2016, 02:39 |
Negative cell volume
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#14 |
New Member
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Dear Bigben,
Am working on Gerotor oil pump analysis , Am facing a negative cell volume error while doing a preview mesh motion. I want to know is it any command is available to display or view a negative cell to redefine my mesh again. Regards, Ganesh.t ganesh.t@sfl.co.in |
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March 27, 2017, 17:58 |
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#15 | |
New Member
Kubilay BAYRAMOĞLU
Join Date: Jan 2017
Posts: 1
Rep Power: 0 |
Quote:
k.bayramoglu.b@gmail.com |
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September 2, 2017, 23:03 |
Sir, I am facing the same problem of negative cell volume.
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#16 | |
New Member
Samm
Join Date: Aug 2017
Posts: 1
Rep Power: 0 |
Quote:
Sir, my email id is saumyaranjan.nayak93@gmail.com |
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