吉林大学学报(理学版) ›› 2020, Vol. 58 ›› Issue (5): 1154-1158.

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对流-扩散方程初边值问题的重整化群方法

周冉1, 张艳妮2   

  1. 1. 吉林大学 数学学院, 长春 130012; 2. 吉林建筑科技学院 基础科学部, 长春 130114
  • 收稿日期:2020-02-17 出版日期:2020-09-26 发布日期:2020-11-18
  • 通讯作者: 张艳妮 E-mail:58212546@qq.com

Renormalization Group Method for  Initial-Boundary Value Problem of  Convection-Diffusion Equation

ZHOU Ran1, ZHANG Yanni2   

  1. 1. College of Mathematics, Jilin University, Changchun 130012, China;
    2. Department of Basic Science, Jilin University of Architecture and Technology, Changchun 130114, China
  • Received:2020-02-17 Online:2020-09-26 Published:2020-11-18

摘要: 利用摄动重整化群方法研究一类对流-扩散方程的奇异摄动初边值问题. 首先将时滞微分方程分解为左、右两个不带时滞的边值问题, 然后利用重整化群方法分别构造左问题和右问题的渐近解, 最后利用光滑缝接条件将左右两段解相连, 得到原问题的逼近解.

关键词: 重整化群方法, 奇异摄动, 对流-扩散方程

Abstract: We studied a class of singular perturbation initial-boundary value problem of the convection-diffusion equation by using the perturbed renormalization group method. Firstly, the delay differential equation was decomposed into left and right boundary value problems without delay. Secondly,  the asymptotic solutions of left and right problems were constructed by using renormalization group method. Finally, the left and right solutions were connected by smooth joint condition, and the asymptotic solutions of the original problem were obtained.

Key words: renormalization group method, singular perturbation, convection-diffusion equation

中图分类号: 

  • O175.12