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Boundary Conditions Solutions

1172: Running time dependent CFD simulations

A common mistake when running transient fluid flow studies with COMSOL Multiphysics is to start the simulation with conflicting boundary conditions. Let's take a simple example to illustrate this issue. We will compute...
Version: All versions - Platform: All Platforms

1168: The New Hover-and-Click Selection Method in COMSOL 4.4 and COMSOL 5.0

How can I select interior surfaces in my geometry in COMSOL 4.4 and COMSOL 5.0? The new way of selecting geometry objects or geometric entities in COMSOL 4.4 (and later versions) is a one-click selection. To select...
Version: 4.4,5.0 - Platform: All Platforms

1101: Error: Pointwise constraints for time derivatives are not supported

How do I set up a boundary constraint condition involving a time derivative of the solution variable? I tried, but I keep getting the following error message:   If you are using a PDE interface and solving for the...
Version: 4.1,4.2 - Platform: All Platforms