Acta mathematica scientia,Series A ›› 2014, Vol. 34 ›› Issue (3): 626-637.

• Articles • Previous Articles     Next Articles

Global Existence and Blow-up of Solutions to a Doubly Degenerate Parabolic System with Nonlinear Boundary Conditions

 MI Yong-Sheng1,2, MU Chun-Lai2, WU Yun-Long1   

  1. 1.College of Mathematics and Computer Sciences, Yangtze Normal University, Chongqing 408100;
    2.College of Mathematics and Statistics, Chongqing University, Chongqing 401331
  • Received:2011-07-28 Revised:2013-12-15 Online:2014-06-25 Published:2014-06-25
  • Supported by:

    国家自然科学基金(11371384)和重庆基础与前沿基金(cstc2013jcyjA0940)资助

Abstract:

This paper deals with interactions among three kinds of nonlinear mechanisms: nonlinear diffusion, nonlinear reaction and nonlinear boundary flux in a parabolic model with multiple nonlinearities. We obtain the critical global existence curve and critical Fujita curve by constructing various self-similar supersolutions and subsolu-tions.

Key words: Ritical global existence curve, Degenerate parabolic equation, Critical Fujita curve, Non-Newtonian polytropic
filtration equation,
Blow-up

CLC Number: 

  • 35K55
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