Convergence Problem with body force driven flow

Jinfeng · December 7, 2009, 13:15

Hi folks,

I am running a simulation of air flowing through an open-ended channel under the atmosphere condition. The air movement is driven purely by the electrical body force. There is no initial flow at the inlet. It's a laminar steady flow. I tried SIMPLE and SIMPLEC for the pressure-velocity coupling. For pressure discretization, I tried several including Body Force Weighted. I also reduced URF every now and then during the calculation, but none of these trials suceeded in making the calculation converge. Upto a certain point, the calculation will go towards divergence. What should I do with it? Any suggestions would be appreciated!

Regards,
Jinfeng

Goldsstean · December 9, 2009, 04:54

If it is not Multiphase flow, then try to intialize you solution with FMG (full multi grid solver). Definitly it will work.

December 7, 2009, 13:15	Convergence Problem with body force driven flow	#1
Jinfeng New Member Jinfeng Join Date: Aug 2009 Posts: 6 Rep Power: 17	Hi folks, I am running a simulation of air flowing through an open-ended channel under the atmosphere condition. The air movement is driven purely by the electrical body force. There is no initial flow at the inlet. It's a laminar steady flow. I tried SIMPLE and SIMPLEC for the pressure-velocity coupling. For pressure discretization, I tried several including Body Force Weighted. I also reduced URF every now and then during the calculation, but none of these trials suceeded in making the calculation converge. Upto a certain point, the calculation will go towards divergence. What should I do with it? Any suggestions would be appreciated! Regards, Jinfeng

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December 9, 2009, 04:54		#2
Goldsstean Member Amol Ramteke Join Date: May 2009 Location: Kolkata Posts: 30 Rep Power: 17	If it is not Multiphase flow, then try to intialize you solution with FMG (full multi grid solver). Definitly it will work.