中国物理B ›› 2013, Vol. 22 ›› Issue (7): 74704-074704.doi: 10.1088/1674-1056/22/7/074704

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

An improved element-free Galerkin method for solving generalized fifth-order Korteweg-de Vries equation

冯昭, 王晓东, 欧阳洁   

  1. Department of Applied Mathematics, Northwestern Polytechnical University, Xi'an 710129, China
  • 收稿日期:2012-10-11 修回日期:2013-01-08 出版日期:2013-06-01 发布日期:2013-06-01
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB025903).

An improved element-free Galerkin method for solving generalized fifth-order Korteweg-de Vries equation

Feng Zhao (冯昭), Wang Xiao-Dong (王晓东), Ouyang Jie (欧阳洁)   

  1. Department of Applied Mathematics, Northwestern Polytechnical University, Xi'an 710129, China
  • Received:2012-10-11 Revised:2013-01-08 Online:2013-06-01 Published:2013-06-01
  • Contact: Ouyang Jie E-mail:jieouyang@nwpu.edu.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB025903).

摘要: In this paper, an improved element-free Galerkin (IEFG) method is proposed to solve the generalized fifth-order Korteweg-de Vries (gfKdV) equation. When the traditional element-free Galerkin (EFG) method is used to solve such an equation, unstable or even wrong numerical solutions may be obtained due to the violation of the consistency conditions of the moving least-squares (MLS) shape functions. To solve this problem, the EFG method is improved by employing the improved moving least-squares (IMLS) approximation based on the shifted polynomial basis functions. The effectiveness of the IEFG method for the gfKdV equation is investigated by using some numerical examples. Meanwhile, the motion of single solitary wave and the interaction of two solitons are simulated using the IEFG method.

关键词: element-free Galerkin method, shifted polynomial basis, generalized fifth-order Korteweg-de Vries equation, solitary wave

Abstract: In this paper, an improved element-free Galerkin (IEFG) method is proposed to solve the generalized fifth-order Korteweg-de Vries (gfKdV) equation. When the traditional element-free Galerkin (EFG) method is used to solve such an equation, unstable or even wrong numerical solutions may be obtained due to the violation of the consistency conditions of the moving least-squares (MLS) shape functions. To solve this problem, the EFG method is improved by employing the improved moving least-squares (IMLS) approximation based on the shifted polynomial basis functions. The effectiveness of the IEFG method for the gfKdV equation is investigated by using some numerical examples. Meanwhile, the motion of single solitary wave and the interaction of two solitons are simulated using the IEFG method.

Key words: element-free Galerkin method, shifted polynomial basis, generalized fifth-order Korteweg-de Vries equation, solitary wave

中图分类号:  (Solitary waves)

  • 47.35.Fg
04.30.Nk (Wave propagation and interactions) 02.70.Dh (Finite-element and Galerkin methods) 47.10.ab (Conservation laws and constitutive relations)