Abstract
A new non-conforming finite element method is proposed for the approximation of the biharmonic equation with clamped boundary condition. The new formulation is based on a gradient recovery operator. Optimal a priori error estimates are proved for the proposed approach. The approach is also extended to cover a singularly perturbed problem.
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I am grateful to the anonymous referees for their valuable suggestions to improve the quality of the paper.
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Communicated by Ragnar Winther.
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Lamichhane, B.P. A finite element method for a biharmonic equation based on gradient recovery operators. Bit Numer Math 54, 469–484 (2014). https://doi.org/10.1007/s10543-013-0462-0
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DOI: https://doi.org/10.1007/s10543-013-0462-0
Keywords
- Biharmonic equation
- Clamped boundary conditions
- Strang’s lemma
- Nonconforming method
- A priori estimate
- Biorthogonal system