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2 votes

How to impose boundary conditions when solving a nonlinear dynamical system given by the FEM solver

The general approach in a Newton method is to solve for increments $\delta u$. Then, if your current solution already has the right values at the boundary, $\delta u$ needs to have zero boundary ...
Wolfgang Bangerth's user avatar
3 votes

mesh size restriction of spatial discretization in FEMs and FDMs

Keep in mind that just because the simulation doesn't report any errors, doesn't mean you got the correct solution to the problem you are solving. Sometimes, the reason for that deviation might just ...
Nikola Ristic's user avatar

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