Residuals not converging, but staying stable and fluctuating -- CFD Online Discussion Forums

February 26, 2021, 04:19	Residuals not converging, but staying stable and fluctuating	#1
ashf9 New Member Ash Join Date: Feb 2021 Posts: 20 Rep Power: 5	Hi, I am doing a hypersonic flow simulation on re-entry spacecraft, and for some reason, my residuals don't converge but rather stay stable for a while and then fluctuate (attached is a picture of it). I understand that the fluctuations could be decreased using relaxation factors, but could someone explain to me why the continuity and other variables aren't converging, as I would expect some sort of convergence after Would it be something to do with the mesh or initial BCS Thanks Residual 1.JPG Residual 2.JPG Residual 3.JPG

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