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PDEs, ODEs, and other equations Solutions

1127: Improving convergence in nonlinear time dependent models

My time dependent model solves without any problem as long as I use only linear materials. How can I get it to converge with a nonlinear material?   When a time dependent solver has trouble converging, its default...
Version: 4.2 - Platform: All Platforms

1118: Resolving time-dependent waves

I am solving a time-dependent wave problem, but the solution does not look quite right. I was expecting a smooth propagating waveform but see mostly noise.   The accuracy in a model solving an equation for...
Version: 4.2 - 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