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  • Flow over cylinder- Lesson 12

    Posted by Manoj on February 7, 2024 at 10:35 am

    I
    am not getting the same drag and lift coefficients (value is near to 0) while solving model with Pseudo
    transient method (Coupled), but getting convergence. With SIMPLE method I am
    getting the drag and lift coefficients but not convergence. Do not know why it
    is so.

    Rahul replied 2 months, 1 week ago 2 Members · 1 Reply
  • 1 Reply
  • Rahul

    Member
    February 7, 2024 at 11:30 am

    Hi Manoj,
    The results using SIMPLE method look good. Since the residuals are low and stable, and Cd and Cl values are also stable, the result can be considered as converged. No need of the residual to necessarily go below say 1e-3 or so.
    You may not be getting the right results for coupled since the pseudo timestep size is very low. It may take more time for the flow to be developed. Try using a larger timestep or using the auto method for timestep.
    Best regards
    Rahul
    Flowthermolab support

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