Hi there, thank you for using the forum!
I have a few comments.
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Initially, I noticed that the second simulation finished after 500 loops, and the solution was not converged yet. Maybe you want to consider continuing your run to let the solution converge. Can I Continue an Existing Simulation Run in SimScale?
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Did you make sure to add an inflate boundary layer according to the velocity inlet’s value for both of the cases? What is y+ (yplus)?
Best regards,
Fillia