Pressure diverged when using dynamic mesh

lcg44 · February 4, 2014, 13:47

Hi all,

I'm running a case using dynamic mesh to simulate flow in a valve. But the pressure solution is going diverged (fluctuation, value keeps going up and down), so the dynamic mesh is always generating negative volume.

Yesterday, I try to enable the smoothing function in dynamic mesh model. It worked, the pressure field became reasonalbe. But today I tried again, it doesn't work anymore.

OMG, who can help me. I just don't know what's the reason.

Thanks.

lcg44 · February 5, 2014, 16:11

I changed initialization values. It seems work well now.

February 4, 2014, 13:47	Pressure diverged when using dynamic mesh	#1
lcg44 New Member Chenguang Li Join Date: Sep 2011 Posts: 15 Rep Power: 14	Hi all, I'm running a case using dynamic mesh to simulate flow in a valve. But the pressure solution is going diverged (fluctuation, value keeps going up and down), so the dynamic mesh is always generating negative volume. Yesterday, I try to enable the smoothing function in dynamic mesh model. It worked, the pressure field became reasonalbe. But today I tried again, it doesn't work anymore. OMG, who can help me. I just don't know what's the reason. Thanks.

February 5, 2014, 16:11	Initialization	#2
lcg44 New Member Chenguang Li Join Date: Sep 2011 Posts: 15 Rep Power: 14	I changed initialization values. It seems work well now.

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