English

Long-term behaviour in a chemotaxis-fluid system with logistic source

Analysis of PDEs 2016-02-02 v1

Abstract

We consider the coupled chemotaxis Navier-Stokes model with logistic source terms nt+un=Δnχ(nc)+κnμn2 n_t + u\cdot \nabla n = \Delta n - \chi \nabla \cdot (n \nabla c) + \kappa n - \mu n^2 ct+uc=Δcnc c_t + u\cdot \nabla c = \Delta c - nc ut+(u)u=Δu+P+nΦ+f,u=0 u_t + (u\cdot \nabla)u = \Delta u +\nabla P + n\nabla \Phi + f, \quad\qquad \nabla \cdot u=0 in a bounded, smooth domain ΩR3\Omega\subset \mathbb{R}^3 under homogeneous Neumann boundary conditions for nn and cc and homogeneous Dirichlet boundary conditions for uu and with given functions fL(Ω×(0,))f\in L^\infty(\Omega\times(0,\infty)) satisfying certain decay conditions and ΦC1+β(Ωˉ)\Phi\in C^{1+\beta}(\bar\Omega) for some β(0,1)\beta\in(0,1). We construct weak solutions and prove that after some waiting time they become smooth and finally converge to the semi-trivial steady state (κμ,0,0)(\frac{\kappa}{\mu},0,0). Keywords: chemotaxis, Navier-Stokes, logistic source, boundedness, large-time behaviour

Keywords

Cite

@article{arxiv.1602.00665,
  title  = {Long-term behaviour in a chemotaxis-fluid system with logistic source},
  author = {Johannes Lankeit},
  journal= {arXiv preprint arXiv:1602.00665},
  year   = {2016}
}
R2 v1 2026-06-22T12:41:20.069Z