Is it converged or not?

hotboy · March 23, 2015, 20:34

Hello friends!
I was modeling natural convection ,the picture of scaled residuals is this 1.jpg,the residuals of k ,x-velocity ,y-velocity ,z-velocity are very high ,that's why ?Is it converged or not? How can I determined it converged or not ?Thank you very much!

sjbub · March 25, 2015, 17:42

The fluent default is around e-4 for all and energy is e-6 (double check the manual) so technically if your residuals get down to those levels and hold steady then you are converged. The fluctuation in your blue line is kind of crazy. I would not like like all that variation in my residuals and would consider something in my set up (BC's or model selections) are set up incorrectly.

March 23, 2015, 20:34	Is it converged or not?	#1
hotboy Member wanghuo Join Date: Aug 2014 Posts: 89 Rep Power: 11	Hello friends! I was modeling natural convection ,the picture of scaled residuals is this 1.jpg,the residuals of k ,x-velocity ,y-velocity ,z-velocity are very high ,that's why ?Is it converged or not? How can I determined it converged or not ?Thank you very much!

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March 25, 2015, 17:42		#2
sjbub New Member anonymous Join Date: Mar 2015 Posts: 25 Rep Power: 11	The fluent default is around e-4 for all and energy is e-6 (double check the manual) so technically if your residuals get down to those levels and hold steady then you are converged. The fluctuation in your blue line is kind of crazy. I would not like like all that variation in my residuals and would consider something in my set up (BC's or model selections) are set up incorrectly.