English

Blow up of solutions for a Parabolic-Elliptic Chemotaxis System with gradient dependent chemotactic coefficient

Analysis of PDEs 2021-11-08 v1

Abstract

We consider a Parabolic-Elliptic system of PDE's with a chemotactic term in a NN-dimensional unit ball describing the behavior of the density of a biological species "uu" and a chemical stimulus "vv". The system includes a nonlinear chemotactic coefficient depending of ``v\nabla v", i.e. the chemotactic term is given in the form div(χuvp2v),\mboxfor p(NN1,2),N>2- div (\chi u |\nabla v|^{p-2} \nabla v), \qquad \mbox{ for } \ p \in ( \frac{N}{N-1},2), \qquad N >2 for a positive constant χ\chi when vv satisfies the poisson equation Δv=u1ΩΩu0dx.- \Delta v = u - \frac{1}{|\Omega|} \int_{\Omega} u_0dx. We study the radially symmetric solutions under the assumption in the initial mass 1ΩΩu0dx>6. \frac{1}{|\Omega|} \int_{\Omega} u_0dx>6. For χ\chi large enough, we present conditions in the initial data, such that any regular solution of the problem blows up at finite time.

Keywords

Cite

@article{arxiv.2111.03358,
  title  = {Blow up of solutions for a Parabolic-Elliptic Chemotaxis System with gradient dependent chemotactic coefficient},
  author = {J. Ignacio Tello},
  journal= {arXiv preprint arXiv:2111.03358},
  year   = {2021}
}