کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4640604 1341280 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Finite element methods with numerical quadrature for elliptic problems with smooth interfaces
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات ریاضیات کاربردی
پیش نمایش صفحه اول مقاله
Finite element methods with numerical quadrature for elliptic problems with smooth interfaces
چکیده انگلیسی

The purpose of this paper is to study the effect of the numerical quadrature on the finite element approximation to the exact solution of elliptic equations with discontinuous coefficients. Due to low global regularity of the solution, it seems difficult to achieve optimal order of convergence with classical finite element methods [Z. Chen, J. Zou, Finite element methods and their convergence for elliptic and parabolic interface problems, Numer. Math. 79 (1998) 175–202]. We derive error estimates in finite element method with quadrature for elliptic interface problems in a two-dimensional convex polygonal domain. Optimal order error estimates in L2L2 and H1H1 norms are shown to hold even if the regularity of the solution is low on the whole domain. Finally, numerical experiment for two dimensional test problem is presented in support of our theoretical findings.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational and Applied Mathematics - Volume 234, Issue 2, 15 May 2010, Pages 605–612
نویسندگان
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