Fail to converge

Jonahprivett · March 22, 2016, 11:32

I'm running an air flow in a room simulation, but my solution does not converge, even to 10E-4. What can I do to improve convergence?

khnayanar · March 24, 2016, 14:39

Hello.

Have monitored any other parameters such as velocity or pressure at some planes? 10e-3 continuity convergence is good enough for room simulations as there will be many recirculation areas. Check your mass balance too. Convergence is not just about achieving 10e-4 or something.

Thanks and regards,
Hari

uvvis · June 22, 2016, 22:37

khnayanar ! I also have similar simulation of air passing through a box (30X40X50 cm3) which have re circulation areas. Convergence criteria is 10-4 but solution is not fully converged. I also done imbalance analysis. Can you comment that this convergence acceptable? (pics attached)IMG_6153.jpg

IMG_6152.jpg

March 22, 2016, 11:32	Fail to converge	#1
Jonahprivett New Member Jonah Join Date: Mar 2016 Posts: 5 Rep Power: 10	I'm running an air flow in a room simulation, but my solution does not converge, even to 10E-4. What can I do to improve convergence?

March 24, 2016, 14:39		#2
khnayanar New Member Harikrishnan Join Date: Mar 2016 Posts: 7 Rep Power: 10	Hello. Have monitored any other parameters such as velocity or pressure at some planes? 10e-3 continuity convergence is good enough for room simulations as there will be many recirculation areas. Check your mass balance too. Convergence is not just about achieving 10e-4 or something. Thanks and regards, Hari Jonahprivett likes this.

June 22, 2016, 22:37	is this Convergence acceptable?	#3
uvvis New Member uvvis Join Date: Jan 2015 Posts: 5 Rep Power: 11	khnayanar ! I also have similar simulation of air passing through a box (30X40X50 cm3) which have re circulation areas. Convergence criteria is 10-4 but solution is not fully converged. I also done imbalance analysis. Can you comment that this convergence acceptable? (pics attached)IMG_6153.jpg IMG_6152.jpg Jonahprivett likes this.

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