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arXiv 1202.2220math.AP
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动态边界条件下反应扩散方程的非线性对流

Nonlinear Convection in Reaction-diffusion Equations under dynamical boundary conditions

Gaëlle Pincet Mailly, Jean-François Rault

摘要:

研究了具有耗散动力学边界条件$σ\partial_t u + \partial_νu =0$的含非线性对流项$\partial_t u = Δu - g(u) \cdot \nabla u + f(u)$的非线性反应扩散方程在$\mathbb{R}^N$的有界区域上正解的爆破现象.讨论了$g$和$f$正解在有限时间爆破的条件.此外,对于某些类别的非线性,爆破时间的上限可以推导出和爆破率可以确定。

英文摘要:

We investigate blow-up phenomena for positive solutions of nonlinear reaction-diffusion equations including a nonlinear convection term $\partial_t u = Δu - g(u) \cdot \nabla u + f(u)$ in a bounded domain of $\mathbb{R}^N$ under the dissipative dynamical boundary conditions $σ\partial_t u + \partial_νu =0$. Some conditions on $g$ and $f$ are discussed to state if the positive solutions blow up in finite time or not. Moreover, for certain classes of nonlinearities, an upper-bound for the blow-up time can be derived and the blow-up rate can be determinated.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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