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2013-01-17

A Novel Fast Solver for Poisson's Equation with Neumann Boundary Condition

By Zu-Hui Ma, Weng Cho Chew, and Li Jun Jiang
Progress In Electromagnetics Research, Vol. 136, 195-209, 2013
doi:10.2528/PIER12112010

Abstract

In this paper, we present a novel fast method to solve Poisson's equation in an arbitrary two dimensional region with Neumann boundary condition, which are frequently encountered in solving electrostatic boundary problems. The basic idea is to solve the original Poisson's equation by a two-step procedure. In the first stage, we expand the electric field of interest by a set of tree basis functions and solve it with a fast tree solver in O(N) operations. The field such obtained, however, fails to expand the exact field because the tree basis is not curl-free. Despite of this, we can retrieve the correct electric field by purging the divergence-free field. Next, for the second stage, we find the potential distribution rapidly with a same fast solution of O(N) complexity. As a result, the proposed method dramatically reduces solution time compared with traditional FEM with iterative method. In addition, it is the first time that the loop-tree decomposition technique has been introduced to develop fast Poisson solvers. Numerical examples including electrostatic simulations are presented to demonstrate the efficiency of the proposed method.

Citation


Zu-Hui Ma, Weng Cho Chew, and Li Jun Jiang, "A Novel Fast Solver for Poisson's Equation with Neumann Boundary Condition," Progress In Electromagnetics Research, Vol. 136, 195-209, 2013.
doi:10.2528/PIER12112010
http://jpier.org/PIER/pier.php?paper=12112010

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