|May 31, 2013, 04:27||
on the "negative cell volume" problem - udf: dynamesh
Join Date: Oct 2011
Location: Athens, Greece
Posts: 19Rep Power: 6
Dear CFD-online community,
I always encounter the "Negative cell volume" detection error during an individual dynamic mesh - 6DOF motion simulation. In the past i was able to face this problem by using the "preview mesh motion" option before the solution to track the time moment when the mesh would hang-off and adopt a smaller time step (depending on the velocity of the moving body with respect to the rate of deformation of the adjacent cell zone). Now, within a 6DOF motion simulation although i can't track the hang-off of the mesh while previewing the motion and it seems to move and deform fine, i always get the "negative volume" error. I've tried extremely small time steps and still encounter the same problem.
I would be grateful for any suggestions...
|Thread||Thread Starter||Forum||Replies||Last Post|
|UDF problem in multiphase boundary condition||abolfazl364||FLUENT||1||April 5, 2015 21:38|
|UDF problem in multiphase||abolfazl364||Fluent UDF and Scheme Programming||0||February 6, 2012 12:20|
|Help! Compiled UDF problem 4 Wave tank tutorial||Shane||FLUENT||1||September 3, 2010 02:32|
|fluent UDF external library lapack problem||Rick||FLUENT||0||May 7, 2008 10:16|
|the problem of UDF||zzb||FLUENT||2||April 5, 2006 05:36|