Acta mathematica scientia,Series A ›› 2019, Vol. 39 ›› Issue (6): 1421-1442.

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Pointwise Estimates for Systems of Wave Equations with Viscosity

Zhigang Wu*(),Xiaofang Miao   

  1. College of Science, Donghua University, Shanghai 201620
  • Received:2018-05-14 Online:2019-12-26 Published:2019-12-28
  • Contact: Zhigang Wu E-mail:zgwu@dhu.edu.cn
  • Supported by:
    the NSF of Shanghai(16ZR1402100);the Fundamental Research Funds for the Central Universities(2232019D3-43)

Abstract:

The Cauchy problem for two systems of wave equations with viscosity in dimension three is considered. By using the long wave and short wave decomposition method together with energy method and Green function, the pointwise estimates of the time-asymptotic shape of the solution are given, which exhibit two kinds of generalized Huygens' waves. As a byproduct, the optimal Lp-decay rates with p ≥ 1 of the solutions of these systems are also established.

Key words: Green function, Systems of wave equations with viscosity, Huygens' principle

CLC Number: 

  • O175.2
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