Blow-up in a quasilinear parabolic-elliptic Keller-Segel system with logistic source

Abstract

This paper deals with the quasilinear parabolic-elliptic Keller-Segel system with logistic source, \begin{align*} u_t=Δ(u+1)^m - χ\nabla \cdot (u(u+1)^{α- 1} \nabla v) + λ(|x|) u - μ(|x|) u^κ, \quad 0=Δv - v + u, \quad x\inΩ,\ t>0, \end{align*} where $\Omega :=B_R(0)\subset {\mathbb{R}}^n(n\ge 3)$ is a ball with some $R>0$; $m>0$, $\chi >0$, $\alpha >0$ and $\kappa \ge 1$; $\lambda$ and $\mu$ are spatially radial nonnegative functions. About this problem, Winkler (Z. Angew. Math. Phys.; 2018; 69; Art. 69, 40) found the condition for $\kappa$ such that solutions blow up in finite time when $m=\alpha =1$. In the case that $m=1$ and $\alpha \in (0,1)$ as well as $\lambda$ and $\mu$ are constant, some conditions for $\alpha$ and $\kappa$ such that blow-up occurs were obtained in a previous paper (Math. Methods Appl. Sci.; 2020; 43; 7372-7396). Moreover, in the case that $m\ge 1$ and $\alpha =1$ Black, Fuest and Lankeit (arXiv:2005.12089[math.AP]) showed that there exists initial data such that solutions blow up in finite time under some conditions for $m$ and $\kappa$. The purpose of the present paper is to give conditions for $m\ge 1$, $\alpha >0$ and $\kappa \ge 1$ such that solutions blow up in finite time.

References in corpus (1)

• New critical exponents in a fully parabolic quasilinear Keller-Segel and applications to volume filling models

Cited by in corpus (2)

• Blow-up phenomena in a parabolic-elliptic-elliptic attraction-repulsion chemotaxis system with superlinear logistic degradation
• Finite time blow-up in a parabolic-elliptic Keller-Segel system with nonlinear diffusion and signal-dependent sensitivity