Boundedness in a parabolic-parabolic chemotaxis system with nonlinear diffusion

Boundedness in a parabolic-parabolic chemotaxis system with nonlinear diffusion
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非线性扩散抛物线-抛物线趋化系统中的有界性

DOI:
10.1007/s00033-013-0375-4
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发表时间:
2014-12
影响因子:
2
通讯作者:
Zhou Shouming
Zhou Shouming
中科院分区:
数学3区
文献类型:
--
作者:
Wang Liangchen;Mu Chunlai;Zhou Shouming

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本文讨论拟线性趋化系统$$\left\{\开始{array}{ll} ut =\nabla \cdot(D(u)\nabla u)- \nabla \cdot解的整体存在性和有界性(u \chi(v)\nabla v),\quad \quad x \in \Omega,\quad t > 0,\\v_t = \Delta v-u f(v),\quad \quad \quad\quad\quad \quad x \in \Omega,\quad t > 0,\end {array}\right.$$在齐次Neumann边界条件下,在凸光滑有界区域上,具有非负初始数据(对于某些θ >n)和.假定给定的函数和f(s)对所有≥ 0都是充分光滑的,且f(0)= 0.该模型描述了细胞的运动(例如,细菌)在细胞消耗的氧浓度梯度的作用下。在满足一定的技术条件下,证明了相应的初边值问题存在唯一的整体古典解,且解是一致有界的.
This paper deals with the global existence and boundedness of the solutions for the quasilinear chemotaxis system $$\left\{\begin{array}{ll}u_t=\nabla \cdot (D(u) \nabla u)- \nabla \cdot (u \chi(v) \nabla v), \quad \quad x \in \Omega, \quad t > 0,\\v_t = \Delta v-u f(v), \quad \quad \quad \quad \quad \quad \quad \quad \quad x \in \Omega, \quad t > 0,\end{array}\right.$$under homogeneous Neumann boundary conditions in a convex smooth bounded domain, with nonnegative initial data(for some θ >n) and. The given functionsandf(s) are supposed to be sufficiently smooth for alls≥ 0 and such thatf(0) = 0. This model describes the motion of the cells (e.g., bacteria) under the effect of gradients of the concentration of the oxygen that is consumed by the cells. It is proved that the corresponding initial boundary value problem possesses a unique global classical solution that is uniformly bounded inprovided that some technical conditions are fulfilled.
DOI: 10.1007/978-0-387-49319-0
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