数学物理学报 ›› 2014, Vol. 34 ›› Issue (3): 626-637.

• 论文 • 上一篇    下一篇

具有多重非线性的非牛顿多方渗流方程的整体存在性与非存在性

米永生1,2|穆春来2|吴云龙1   

  1. 1.长江师范学院 数学与计算机学院 重庆 408100;
    2.重庆大学 数学与统计学院 重庆 |401331
  • 收稿日期:2011-07-28 修回日期:2013-12-15 出版日期:2014-06-25 发布日期:2014-06-25
  • 基金资助:

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

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

摘要:

考虑了一个具有多重非线性的抛物模型中, 非线性扩散项、非线性反应项和非线性边界流三种非线性机制之间的相互作用. 通过构造自相似上解和自相似下解, 获得了临界整体存在性曲线和临界Fujita曲线.

关键词: 临界整体存在性曲线, 退化抛物方程, 临界Fujita曲线, 非牛顿多方渗流方程, 爆破

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

中图分类号: 

  • 35K55