Justin Chang <[email protected]> writes: > Hello everyone, > > In SNES ex62, it seems to solve the Stokes equation using TH elements > (i.e., using P2-P1 elements). However, this formulation is not locally > conservative, and as a result many people use the P2-P1/P0 elements where > the pressure space is enriched with a piece-wise constant to ensure mass > conservation at the element level.
1. P2-P1disc is not stable. 2. P1disc is not "P1 enriched with piecewise constant", and the latter does not make sense. 3. You're probably thinking of the Crouzeix-Raviart element, which has P1disc pressure and P2 enriched with a cubic bubble for velocity. That element is stable and locally conservative.
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