******************* 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. ******************* Hi, I'm currently working on a project involving the periodic hill geometry, and I've encountered an issue with the mesh simulation using Nektar. Despite successfully creating a decent mesh and correctly labeling all physical groups (inlet, outlet, top, and bottom boundary), I've noticed that the vertices at the inlet seem to exhibit a no-slip boundary condition, while the edges themselves seem to follow a periodic inlet/outlet condition. This behavior is unexpected since I've specified a periodic inlet/outlet boundary condition during the simulation. Has anyone experienced this problem before and found a way to resolve it? Any suggestions or insights would be greatly appreciated! A figure of P order of 5 is attached to demonstrate the problem visually. [cid:image001.png@01D966D9.475EC5B0] Thanks, Dustin Ma