A Numerical Method for Solving Matrix Coefficient Heat Equations with Interfaces. Issue 4 (10th November 2015)

• Record Type: Journal Article
• Authors: Wang, Liqun; Shi, Liwei
• Is Part Of: Numerical mathematics. Volume 8:Issue 4(2015)
• Page Start: 475
• Page End: 495
• Publication Date: 2015-11-10
• Subjects: 65N30; Heat equation, -- Sharp-edged interface, -- Jump condition, -- Matrix coefficient; Numerical analysis -- Periodicals; Numerical analysis; Periodicals; 518.05
• DOI: 10.4208/nmtma.2015.m1331
• Languages: English
• ISSNs: 1004-8979

Abstract

Abstract: In this paper, we propose a numerical method for solving the heat equations with interfaces. This method uses the non-traditional finite element method together with finite difference method to get solutions with second-order accuracy. It is capable of dealing with matrix coefficient involving time, and the interfaces under consideration are sharp-edged interfaces instead of smooth interfaces. Modified Euler Method is employed to ensure the accuracy in time. More than 1.5th order accuracy is observed for solution with singularity (second derivative blows up) on the sharp-edged interface corner. Extensive numerical experiments illustrate the feasibility of the method.