Global existence and boundedness in a higher-dimensional quasilinear chemotaxis system

2015 ◽  
Vol 66 (6) ◽  
pp. 3159-3179 ◽  
Author(s):  
Yilong Wang ◽  
Zhaoyin Xiang
Keyword(s):  
Global Existence ◽  
Higher Dimensional ◽  
Chemotaxis System

An n-dimensional chemotaxis system with signal-dependent motility and generalized logistic source: global existence and asymptotic stabilization

2020 ◽  
pp. 1-21 ◽  
Author(s):  
Wenbin Lv ◽  
Qingyuan Wang
Keyword(s):  
Initial Data ◽  
Global Existence ◽  
Boundary Conditions ◽  
Classical Solution ◽  
Neumann Boundary ◽  
Logistic Source ◽  
Global Classical Solution ◽  
Higher Dimensional ◽  
Image Position ◽  
Chemotaxis System

Abstract This paper deals with the global existence for a class of Keller–Segel model with signal-dependent motility and general logistic term under homogeneous Neumann boundary conditions in a higher-dimensional smoothly bounded domain, which can be written as $$\eqalign{& u_t = \Delta (\gamma (v)u) + \rho u-\mu u^l,\quad x\in \Omega ,\;t > 0, \cr & v_t = \Delta v-v + u,\quad x\in \Omega ,\;t > 0.} $$ It is shown that whenever ρ ∈ ℝ, μ > 0 and $$l > \max \left\{ {\displaystyle{{n + 2} \over 2},2} \right\},$$ then the considered system possesses a global classical solution for all sufficiently smooth initial data. Furthermore, the solution converges to the equilibrium $$\left( {{\left( {\displaystyle{{\rho _ + } \over \mu }} \right)}^{1/(l-1)},{\left( {\displaystyle{{\rho _ + } \over \mu }} \right)}^{1/(l-1)}} \right)$$ as t → ∞ under some extra hypotheses, where ρ+ = max{ρ, 0}.

scholarly journals GLOBAL EXISTENCE AND BLOW-UP FOR A CHEMOTAXIS SYSTEM

2017 ◽  
Vol 22 (2) ◽  
pp. 237-251
Author(s):  
Xueyong Chen ◽  
Fuxing Hu ◽  
Jianhua Zhang ◽  
Jianwei Shen
Keyword(s):  
Global Existence ◽  
Parabolic System ◽  
Blow Up ◽  
Numerical Test ◽  
Growth Conditions ◽  
Chemotaxis Model ◽  
Global Strong Solution ◽  
Flux Boundary Conditions ◽  
Power Frequency ◽  
Chemotaxis System

In this paper we consider a Keller-Segel-type chemotaxis model with reaction term under no-flux boundary conditions, where the kinetics term of the system is power function. Assuming some growth conditions, the existence of bounded global strong solution to the parabolic-parabolic system is given. We also give the numerical test and find out that there exists a threshold. When the power frequency greater than the threshold, both global solution and blow-up solution exist.

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