Open channel flow with Comsol

[Munchausen]

I want to create an open channel flow model with Comsol. The free surface is a big problem, is it better to use moving mesh or level set method? What are the boundary conditions? Please help me!

[rugweri]

Hi and welcome to this forum

I'm not able to help you, but I'd like to recommend you to specify your problem as precisely as possible, including if necessary images (uploaded here on the forum: no external servers allowed!), schematics (drawn in FidocadJ) and/or code: if you do so, the ones who are able to help you will be allowed to do it the best way

[Munchausen]

I want to include the free surface in this model: