Acta mathematica scientia,Series B ›› 2020, Vol. 40 ›› Issue (4): 1152-1170.doi: 10.1007/s10473-020-0419-8

• Articles • Previous Articles    

QUASI-NEUTRAL LIMIT AND THE INITIAL LAYER PROBLEM OF THE DRIFT-DIFFUSION MODEL

Shu WANG1,2, Limin JIANG1,3   

  1. 1. School of Mathematics and Information Sciences, Guangzhou University, Guangzhou 510006, China;
    2. College of Applied Sciences, Beijing University of Technology, Beijing 100124, China;
    3. College of Science, Zhongyuan University of Technology, Zhengzhou 450007, China
  • Received:2019-03-08 Revised:2019-10-15 Online:2020-08-25 Published:2020-08-21
  • Contact: Limin JIANG E-mail:ajiang2001@126.com
  • Supported by:
    Supported by NSFC (11831003, 11771031, 11531010, and 11726625) of China; NSFQH (2017-ZJ-908) of China; the Beijing Postdoctoral Science Foundation (2018-ZZ-020) and the Chaoyang District Postdoctoral Science Foundation (2018ZZ-01-12).

Abstract: In this article we study quasi-neutral limit and the initial layer problem of the drift-diffusion model. Different from others studies, we consider the physical case that the mobilities of the charges are different. The quasi-neutral limit with an initial layer structure is rigorously proved by using the weighted energy method coupled with multi-scaling asymptotic expansions.

Key words: initial layer, weighted energy functional, multiple scaling asymptotic expansions

CLC Number: 

  • 35Q35
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