A Combined Hybrid Approach To Finte Element For Poisson Equation

This paper applied the idea of energy optimization presented by Tian-xiao Zhou to solve the boundary value problem of Poisson equation. We get a computational method for the combined hybrid finite element. We construct three groups of low-order quadrilateral finite element by using Wilson non-conforming displacement and Taylor non-conforming displacement. Compared to biquadratic element( Q₂ ), this method requires less computation and its precision proves to be better.