Hi Yaguang, Sorry for a very slow response. Not sure if anyone got back to you about this. I do not recall if we can set them independently and if not this might be a bug. However I wonder if you enter it as a variable string whether it can be set to have different values? Cheers, Spencer. From: nektar-users-bounces@imperial.ac.uk <nektar-users-bounces@imperial.ac.uk> on behalf of 谢亚广 <xieyaguang@iet.cn> Date: Wednesday, 18 October 2023 at 12:44 To: nektar-users <nektar-users@imperial.ac.uk> Subject: [Nektar-users] Buoyancy-Driven Compressible Flow Problem This email from xieyaguang@iet.cn 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, I would like to use the Nektar++ compressible solver for simulating buoyancy-driven flow. So I need to set different temperatures for each wall, but I've noticed that the Twall is defined uniformly for all walls and cannot be set individually for each wall. Is there a way to meet my requirements? I would greatly appreciate any assistance! Kind regards Yaguang Xie