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A MODIFIED IMMERSED FINITE VOLUME ELEMENT METHOD FOR ELLIPTIC INTERFACE PROBLEMS

Part of: Partial differential equations, boundary value problems

Published online by Cambridge University Press:  13 May 2020

Q. WANG Open the ORCID record for Q. WANG [Opens in a new window]  and
Z. ZHANG Open the ORCID record for Z. ZHANG [Opens in a new window]
Q. WANG
Affiliation:
College of Engineering, Nanjing Agricultural University, Nanjing210031, China email wangquanxiang163@163.com
Z. ZHANG*
Affiliation:
Jiangsu Key Laboratory for NSLSCS, School of Mathematical Sciences, Nanjing Normal University, Nanjing210023, China email zhangzhiyue@njnu.edu.cn
*
✉zhangzhiyue@njnu.edu.cn
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Abstract

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This paper presents a new immersed finite volume element method for solving second-order elliptic problems with discontinuous diffusion coefficient on a Cartesian mesh. The new method possesses the local conservation property of classic finite volume element method, and it can overcome the oscillating behaviour of the classic immersed finite volume element method. The idea of this method is to reconstruct the control volume according to the interface, which makes it easy to implement. Optimal error estimates can be derived with respect to an energy norm under piecewise $H^{2}$ regularity. Numerical results show that the new method significantly outperforms the classic immersed finite volume element method, and has second-order convergence in $L^{\infty }$ norm.

Keywords

modifiedcontrol volumeinterface problemsCartesian mesh

MSC classification

Primary: 65N08: Finite volume methods

Information

Type
Research Article
Information
The ANZIAM Journal , Volume 62 , Issue 1 , January 2020 , pp. 42 - 61
Copyright
© 2020 Australian Mathematical Society

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