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February 6, 2023, 11:34 |
CFL Number for Incompressible RANS
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#1 |
New Member
Robert
Join Date: Nov 2022
Posts: 14
Rep Power: 3 |
Hi all,
I am working on relatively simple simulations using the Incompressible RANS solver paired with SST turbulence modelling. I am trying to understand how the CFL number setting affects the results. Whilst I understand that the physical phenomenon should be steady state, SU2 runs a pseudo time iteration. My questions are: 1. Can the CFL number cause divergence of a solution? 2. Can the CFL number directly affect the solution (convergence, accuracy and result)? 3. How does the adaptive CFL number change? 4. Any good practices for setting the CFL number? It would be greatly appreciated if anyone could help out with these, in order to decrease my fear of solution variation/error/uncertainty in my calculations. Thank you in advance! |
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February 6, 2023, 14:13 |
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#2 | ||||
Senior Member
bigfoot
Join Date: Dec 2011
Location: Netherlands
Posts: 617
Rep Power: 18 |
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cfl, inc_rans, steady, su2 |
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