Problem in solving radiation equations - CFX

saisanthoshm88 · May 18, 2012, 12:58

I'm running CFX case that involves radiation and I've set the Thermal radiation control --> Iteration interval = 10

The solver is quite fast in running for the first 9 iterations , the 10 th iteration takes a lot of time.

Could some one please suggest me the ways of improving this.

ghorrocks · May 19, 2012, 07:14

Ummm - try Iteration interval = 20..... Isn't that obvious?

Obviously the issue is the radiation model is taking a long time. If your geometry is complex then this is to be expected. You can speed the radiation model up with various parameters, but it has been a while since I did radiation modelling so cannot tell you off the top of my head. But all the parameters are a compromise between accuracy and speed.

May 18, 2012, 12:58	Problem in solving radiation equations - CFX	#1
saisanthoshm88 Senior Member --------- Join Date: Oct 2010 Posts: 303 Rep Power: 17	I'm running CFX case that involves radiation and I've set the Thermal radiation control --> Iteration interval = 10 The solver is quite fast in running for the first 9 iterations , the 10 th iteration takes a lot of time. Could some one please suggest me the ways of improving this. __________________ Best regards, Santhosh.

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May 19, 2012, 07:14		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	Ummm - try Iteration interval = 20..... Isn't that obvious? Obviously the issue is the radiation model is taking a long time. If your geometry is complex then this is to be expected. You can speed the radiation model up with various parameters, but it has been a while since I did radiation modelling so cannot tell you off the top of my head. But all the parameters are a compromise between accuracy and speed.