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#1 |
New Member
Adrian Rouco
Join Date: Mar 2018
Posts: 13
Rep Power: 7 ![]() |
Hello everyone,
I am having a little problem, I have tweaked the relaxation factors following the rule of adding 1 between pressure and velocity and I was getting good results, but now in a new simulation I am getting divergent turbulence sdr and tke after 1000 iterations. Does anyone know why is this happening? It is not a problem of geometry as it has been prepared for CFD and the mesh is as good as it can be taking into account the computational resources. Here you can see what I mean by the residuals diverging. ![]() |
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#2 |
New Member
Join Date: Sep 2010
Location: Wuhan, China
Posts: 23
Rep Power: 15 ![]() |
more details needed
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#3 |
New Member
Adrian Rouco
Join Date: Mar 2018
Posts: 13
Rep Power: 7 ![]() |
What kind of details? The physics model used is an SST k-w gamma transition, it is segregated flow where the relaxation factor of velocity goes from 0.8 to 0.2 linearly and the opposite for the pressure (i.e. from 0.2 to 0.8). [This gave me quite good stability and steady forces]. Don't know what else can I say about it, mesh is good, y+ below 1, growth factors are 1.1 or less..., geometry is healed...
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#4 | |
New Member
Join Date: Sep 2010
Location: Wuhan, China
Posts: 23
Rep Power: 15 ![]() |
Quote:
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#5 |
New Member
Lijo
Join Date: Feb 2022
Posts: 1
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Hi, did you find the reason for convergence?
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#6 |
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allan thomson
Join Date: Mar 2009
Location: scotland
Posts: 45
Rep Power: 16 ![]() |
How do you know that your flow is transitional?
azt |
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