[Nektar-users] problem with changing time-step

******************* This email originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list https://spam.ic.ac.uk/SpamConsole/Senders.aspx to disable email stamping for this address. ******************* 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