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The Approximate Solution of 2D Dirichlet Problem in Doubly Connected Domains
Joint Authors
El-shenawy, Atallah
Shirokova, Elena A.
Source
Advances in Mathematical Physics
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-07-09
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
We propose a new method for constructing an approximate solution of the two-dimensional Laplace equation in an arbitrary doubly connected domain with smooth boundaries for Dirichlet boundary conditions.
Using the fact that the solution of the Dirichlet problem in a doubly connected domain is represented as the sum of a solution of the Schwarz problem and a logarithmic function, we reduce the solution of the Schwartz problem to the Fredholm integral equation with respect to the boundary value of the conjugate harmonic function.
The solution of the integral equation in its turn is reduced to solving a linear system with respect to the Fourier coefficients of the truncated expansion of the boundary value of the conjugate harmonic function.
The unknown coefficient of the logarithmic component of the solution of the Dirichlet problem is determined from the following fact.
The Cauchy integral over the boundary of the domain with a density that is the boundary value of the analytical in this domain function vanishes at points outside the domain.
The resulting solution of the Dirichlet problem is the sum of the real part of the Cauchy integral in the given domain and the logarithmic function.
In order to avoid singularities of the Cauchy integral at points near the boundary, the solution at these points is replaced by a linear function.
The resulting numerical solution is continuous in the domain up to the boundaries.
Three examples of the solution of the Dirichlet problem are given: one example demonstrates the solution with constant boundary conditions in the domain with a complicated boundary; the other examples provide a comparison of the approximate solution with the known exact solution in a noncircular domain.
American Psychological Association (APA)
El-shenawy, Atallah& Shirokova, Elena A.. 2018. The Approximate Solution of 2D Dirichlet Problem in Doubly Connected Domains. Advances in Mathematical Physics،Vol. 2018, no. 2018, pp.1-6.
https://search.emarefa.net/detail/BIM-1119234
Modern Language Association (MLA)
El-shenawy, Atallah& Shirokova, Elena A.. The Approximate Solution of 2D Dirichlet Problem in Doubly Connected Domains. Advances in Mathematical Physics No. 2018 (2018), pp.1-6.
https://search.emarefa.net/detail/BIM-1119234
American Medical Association (AMA)
El-shenawy, Atallah& Shirokova, Elena A.. The Approximate Solution of 2D Dirichlet Problem in Doubly Connected Domains. Advances in Mathematical Physics. 2018. Vol. 2018, no. 2018, pp.1-6.
https://search.emarefa.net/detail/BIM-1119234
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1119234