Residuals non convergence

Jinzhihui · October 13, 2017, 00:41

Hello,
I have been working with CFX on steady-state simulation of an object shaped like an ellipsoid.
During the grid generationg,because the geometry is complicated,computational domain is devided into several domains and the interfaces are set correctly.
The boundary conditions were defined as follows. The inlet boundary was set to
normal speed and the averaged static pressure was specified at the outlet.The other boundary condition were defined correctly.
During the steady state solution, the residual is oscillating as the figure 1 shows below.Maybe the figure 2 is what we expect.
I appreciate any information you could give to help me understand this issue

ghorrocks · October 13, 2017, 02:59

Your images are not attached.

But your question sounds like this FAQ: https://www.cfd-online.com/Wiki/Ansy...gence_criteria

Jinzhihui · October 13, 2017, 07:20

Quote:

Originally Posted by ghorrocks

Your images are not attached.

But your question sounds like this FAQ: https://www.cfd-online.com/Wiki/Ansy...gence_criteria

thanks,I will read this link carefully

October 13, 2017, 00:41	Residuals non convergence	#1
Jinzhihui New Member jinzhihui Join Date: Oct 2017 Posts: 12 Rep Power: 9	Hello, I have been working with CFX on steady-state simulation of an object shaped like an ellipsoid. During the grid generationg,because the geometry is complicated,computational domain is devided into several domains and the interfaces are set correctly. The boundary conditions were defined as follows. The inlet boundary was set to normal speed and the averaged static pressure was specified at the outlet.The other boundary condition were defined correctly. During the steady state solution, the residual is oscillating as the figure 1 shows below.Maybe the figure 2 is what we expect. I appreciate any information you could give to help me understand this issue

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October 13, 2017, 02:59		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	Your images are not attached. But your question sounds like this FAQ: https://www.cfd-online.com/Wiki/Ansy...gence_criteria