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I'm using finite elements method for solving Heat-Transfer problem in 3D space. And there is a problem with 3rd and 2nd type boundary conditions: there are some oscillations near boundaries (in the area of huge gradient). Are there some methods to fix it? It'll be fine if you share some links or ideas.

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What are "3rd and 2nd type boundary conditions"? –  Dan Jan 23 '13 at 0:38
@Dan, I'm not sure if it's important for now, but just for history: we have been taught that 1st type bc is a Dirichlet bc, 2nd type bc is a Neumann bc, 3rd type bc is a Newton (Robin) bc. –  martemyev Sep 10 '13 at 2:08
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