******************* 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 nektar++ community, It seems like I can't join the mattermost as the membership is exceeded. What other alternatives should I consider to get feedback about ideas or questions? It seems like the email list gets minimal attention (historically) especially for someone who is peripherally involved? I would like to throw out some ideas every once in a while, but I'm not sure the best place to put them. My current one has to do with implementing time dependent boundary conditions that are a function of the time stepping method. I.e. for a boundary condition that manages a state similar to a time stepping method should it be constrained to the type and kind of time stepping method. For example, if a Linear multistep method such as adams bashforth is employed. Any boundary condition that uses some derived quantity to define the boundary condition could be defined with a similar method or if you use a different method (Backwards finite difference) wouldn't you lose accuracy at the boundary? How does that affect the global solution? Maybe the broader topic is coupling different fidelity models? Because any time dependent boundary condition that uses derived quantities is essentially solving some kind model and applying it at the boundary. Happy random quandaries, Regards, ~Kurt -- Kurt Sansom