An adaptive high-order unfitted finite element method for elliptic interface problems
NUMERISCHE MATHEMATIK(2021)
摘要
We design an adaptive unfitted finite element method on the Cartesian mesh with hanging nodes. We derive an hp -reliable and efficient residual type a posteriori error estimate on K -meshes. A key ingredient is a novel hp -domain inverse estimate which allows us to prove the stability of the finite element method under practical interface resolving mesh conditions and also prove the lower bound of the hp a posteriori error estimate. Numerical examples are included.
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