Thank you for your email. Are you using as an initialisation field the one that you received with the higher time-step? How large are your starting CFL and the CFL using the new time-step? Could you provide the log file and the session file that you use?

On Wed, 26 Jul 2023 at 05:25, Ehsan Asgari <eh.asgari@gmail.com> wrote:

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Dear All,

When I change the time-step size to reduce the CFL and restart the simulation, I get oscillations in both pressure and velocity that won't go away.
Is there any explanation for this?

Kind regards
syavash
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