Abstract
We analyze nonconforming finite element approximations of streamline-diffusion type for solving convection-diffusion problems. Both the theoretical and numerical investigations show that additional jump terms have to be added in the nonconforming case in order to get the same \(O(h^{k+1/2})\) order of convergence in L\(^2\) as in the conforming case for convection dominated problems. A rigorous error analysis supported by numerical experiments is given.
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