The Fourier finite element method for the corner singularity expansion of the Heat equation
SCIE
SCOPUS
- Title
- The Fourier finite element method for the corner singularity expansion of the Heat equation
- Authors
- Choi, HJ; Kweon, JR
- Date Issued
- 2015-01
- Publisher
- Pergamon Press Ltd.
- Abstract
- Near the non-convex vertex the solution of the Heat equation is of the form u = (c star epsilon) chi r(pi/omega) sin(pi theta/omega) + omega, omega is an element of L-2(R+; H-2), where c is the stress intensity function of the time variable t,* the convolution, epsilon (x, t) = re(-r2/4t)/2 root pi t(3), chi a cutoff function and omega the opening angle of the vertex. In this paper we use the Fourier finite element method for approximating the stress intensity function c and the regular part omega, and derive the error estimates depending on the regularities of c and omega. We give some numerical examples, confirming the derived convergence rates. (C) 2014 Elsevier Ltd. All rights reserved.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/27253
- DOI
- 10.1016/J.CAMWA.2014.11.04
- ISSN
- 0898-1221
- Article Type
- Article
- Citation
- Computers and Mathematics with Applications, vol. 69, no. 1, page. 13 - 30, 2015-01
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