Nonconforming Finite Element Method Applied to the Driven Cavity Problem. (8th March 2017)

• Record Type: Journal Article
• Authors: Lim, Roktaek; Sheen, Dongwoo
• Is Part Of: Communications in computational physics. Volume 21:Number 4(2017:Apr.)
• Page Start: 1012
• Page End: 1038
• Publication Date: 2017-03-08
• Subjects: 65N30, -- 74S05; Nonconforming finite element method, -- incompressible Navier-Stokes equations, -- lid driven cavity problem; Mathematical physics -- Data processing -- Periodicals; Physics -- Data processing -- Periodicals; 530.150285
• DOI: 10.4208/cicp.OA-2016-0039
• Languages: English
• ISSNs: 1815-2406

Abstract

Abstract: A cheapest stable nonconforming finite element method is presented for solving the incompressible flow in a square cavity without smoothing the corner singularities. The stable cheapest nonconforming finite element pair based on P 1 × P 0 on rectangularmeshes [29] is employed with a minimal modification of the discontinuous Dirichlet data on the top boundary, where is the finite element space of piecewise constant pressures with the globally one-dimensional checker-board pattern subspace eliminated. The proposed Stokes elements have the least number of degrees of freedom compared to those of known stable Stokes elements. Three accuracy indications for our elements are analyzed and numerically verified. Also, various numerous computational results obtained by using our proposed element show excellent accuracy.