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Old   June 21, 2006, 03:52
Default On LBB stability condition
Yang Cao
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Hi all: In solving N-S eqns. using finite elements, some elements are LBB (Ladyzanskya Babuska Brezzi) stable and others are not. For instance, linear triangular elements with non-staggered grids (solving for u,v,w,p at every grid point) are proven to be LBB non-compliant. Can some expert explain (in simple and clear terms), (i) What is this LBB condition (here I am damn scared of Mathematical proofs and I want a more physics based explanation) ? (ii) What will happen if we choose LBB non-compliant elements (results will be inaccurate or something extra ?)
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Old   June 21, 2006, 06:10
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