Acta mathematica scientia,Series B ›› 2017, Vol. 37 ›› Issue (1): 79-96.doi: 10.1016/S0252-9602(16)30117-5

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THE POINTWISE ESTIMATES OF SOLUTIONS FOR A NONLINEAR CONVECTION DIFFUSION REACTION EQUATION

Guowei LIU   

  1. School of Mathematical Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2015-10-28 Revised:2016-04-29 Online:2017-02-25 Published:2017-02-25
  • About author:Guowei LIU,E-mail:guoweiliu19881203@163.com

Abstract:

This paper studies the time asymptotic behavior of solutions for a nonlinear convection diffusion reaction equation in one dimension. First, the pointwise estimates of solutions are obtained, furthermore, we obtain the optimal Lp, 1≤p≤+∞, convergence rate of solutions for small initial data. Then we establish the local existence of solutions, the blow up criterion and the sufficient condition to ensure the nonnegativity of solutions for large initial data. Our approach is based on the detailed analysis of the Green function of the linearized equation and some energy estimates.

Key words: convection diffusion reaction equation, pointwise estimate, Green function, energy method

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