A Bilinear Immersed Finite Volume Element Method for the Diffusion Equation with Discontinuous Coefficient
X.-M. He 1, T. Lin 1*, Y. Lin 21 Department of Mathematics, Virginia Tech, Blacksburg, VA 24060, USA.
2 Department of Mathematical and Statistical Science, University of Alberta, Edmonton AB, T6G 2G1, Canada; and Department of Applied Mathematics, The Hong Kong Polytechnic University, Kowloon, Hong Kong.
Received 17 December 2007; Accepted (in revised version) 6 June 2008
Available online 24 November 2008
This paper is to present a finite volume element (FVE) method based on the bilinear immersed finite element (IFE) for solving the boundary value problems of the diffusion equation with a discontinuous coefficient (interface problem). This method possesses the usual FVE method's local conservation property and can use a structured mesh or even the Cartesian mesh to solve a boundary value problem whose coefficient has discontinuity along piecewise smooth nontrivial curves. Numerical examples are provided to demonstrate features of this method. In particular, this method can produce a numerical solution to an interface problem with the usual O(h^2) (in L^2 norm) and O(h) (in H^1 norm) convergence rates.AMS subject classifications: 65N15, 65N30, 65N50, 35R05
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Key words: Interface problems, immersed interface, finite volume element, discontinuous coefficient, diffusion equation.
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