Oscillating residual

yschati · January 13, 2011, 02:09

Hello all
I am doing a simulation through the duct of an aircraft compressor. Air comes in at higher temperature into the duct. Inside the domain, cooler air is injected through holes. So basically I am simulating flow with heat transfer.
Unfortunately I am getting an oscillatory residual behaviour which is non converged. As a result, the solution is absurd (like the mass flow is not conserved between the inlet, outlet and injection ports).
Can someone suggest what to do?
Please, it is urgent.

ghorrocks · January 13, 2011, 16:54

http://www.cfd-online.com/Wiki/Ansys...gence_criteria

montgoal · June 21, 2017, 22:24

ghorrocks posts this link easily 10 times a day

ghorrocks · June 21, 2017, 23:50

It feels like that sometimes. Maybe I should rename the link as "really frequently asked questions".

January 13, 2011, 02:09	Oscillating residual	#1
yschati New Member Yash Join Date: Nov 2010 Posts: 8 Rep Power: 16	Hello all I am doing a simulation through the duct of an aircraft compressor. Air comes in at higher temperature into the duct. Inside the domain, cooler air is injected through holes. So basically I am simulating flow with heat transfer. Unfortunately I am getting an oscillatory residual behaviour which is non converged. As a result, the solution is absurd (like the mass flow is not conserved between the inlet, outlet and injection ports). Can someone suggest what to do? Please, it is urgent.

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January 13, 2011, 16:54		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,979 Rep Power: 145	http://www.cfd-online.com/Wiki/Ansys...gence_criteria

June 21, 2017, 22:24		#3
montgoal New Member Alex Montgomery Join Date: May 2017 Posts: 2 Rep Power: 0	ghorrocks posts this link easily 10 times a day

June 21, 2017, 23:50		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,979 Rep Power: 145	It feels like that sometimes. Maybe I should rename the link as "really frequently asked questions".