Grid check failed .... run simulation useless?

Zigainer · May 16, 2012, 06:32

Hi,

I was just windering, if the grid check fails (in my case due to face handedness (left-handed cells but no negative volume)) any simulation is useless?
So without a passed grid check it's not worth to start a simulation?
I anyway get convergence with the first iteration and I think it is the grid quality, but I am not sure.
Am I right?

prince_pahariaa · May 16, 2012, 08:10

Yeah you are right..

Grid check should not fail in gambit
Check the area where you are observing face handedness problem.
Change the grid

foamcfd · May 17, 2012, 05:31

Do you mean that you are having the divergence right from first iteration? Are you using grid interfaces (non conformal mesh)? If so then I wouldn't worry too much for fewer left handed cells. If not then it should be fixed. However before concluding left handed faces for the divergence, I would have one more look in my case set up.

May 16, 2012, 06:32	Grid check failed .... run simulation useless?	#1
Zigainer Senior Member Join Date: May 2011 Location: Germany Posts: 130 Rep Power: 15	Hi, I was just windering, if the grid check fails (in my case due to face handedness (left-handed cells but no negative volume)) any simulation is useless? So without a passed grid check it's not worth to start a simulation? I anyway get convergence with the first iteration and I think it is the grid quality, but I am not sure. Am I right?

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May 16, 2012, 08:10		#2
prince_pahariaa Member prince Join Date: Jun 2011 Posts: 56 Rep Power: 15	Yeah you are right.. Grid check should not fail in gambit Check the area where you are observing face handedness problem. Change the grid

May 17, 2012, 05:31		#3
foamcfd New Member Yogesh Patil Join Date: Nov 2009 Posts: 20 Rep Power: 17	Do you mean that you are having the divergence right from first iteration? Are you using grid interfaces (non conformal mesh)? If so then I wouldn't worry too much for fewer left handed cells. If not then it should be fixed. However before concluding left handed faces for the divergence, I would have one more look in my case set up.