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CFX not converging for steady state 3D wing run |
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#1 |
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Thu Win
Join Date: Apr 2017
Posts: 70
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![]() ![]() My 3D wing run residuals aren't converging Any idea how to improve this? My box are 10x the chord length. |
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#2 |
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Join Date: Nov 2015
Posts: 246
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#3 |
Member
Thu Win
Join Date: Apr 2017
Posts: 70
Rep Power: 9 ![]() |
I don't suppose you have access to the 2020R2 CFX manual or know where I can download it? I'm using a lab computer for CFX but I want to read the manual on my own pc. However, it's asking me to register using an Ansys customer ID.
Edit: how can I do this? "View the residuals on a representative plane or as a isosurface with a lower then your maximum residual as value." What do you mean iso surface with a lower than your maximum residual as value? |
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#4 |
Senior Member
Join Date: Nov 2015
Posts: 246
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For manual - use older versions available on the internet, or ask your advisor for access to documentation.
For residuals - in the output control tab enable "Output Residuals" checkbox. Thus your results will contain residuals and you can work with them like with other variables. ![]() |
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#5 |
Member
Thu Win
Join Date: Apr 2017
Posts: 70
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Thanks. I've checked my residuals and they look to constant.
I plot them as a contour on a plane on the XY axis. |
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#6 |
Senior Member
Join Date: Nov 2015
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BTW, 40 iterations is usually too low to achieve convergence. Do you run simulation for longer periods? Residuals may "bounce" - decline non monotonically, with some local "peaks".
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#7 |
Member
Thu Win
Join Date: Apr 2017
Posts: 70
Rep Power: 9 ![]() |
I will run it overnight with more runs
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