On a doubly nonlinear diffusion model of chemotaxis with prevention of overcrowding

Details On a doubly nonlinear diffusion model of chemotaxis with prevention of overcrowding On a doubly nonlinear diffusion model of chemotaxis with prevention of overcrowding

2008-08-25

arxiv.org/abs/0808.3394v1

Mathematics

Analysis of PDEs

Scientific paper

This paper addresses the existence and regularity of weak solutions for a fully parabolic model of chemotaxis, with prevention of overcrowding, that degenerates in a two-sided fashion, including an extra nonlinearity represented by a $p$-Laplacian diffusion term. To prove the existence of weak solutions, a Schauder fixed-point argument is applied to a regularized problem and the compactness method is used to pass to the limit. The local H\"older regularity of weak solutions is established using the method of intrinsic scaling. The results are a contribution to showing, qualitatively, to what extent the properties of the classical Keller-Segel chemotaxis models are preserved in a more general setting. Some numerical examples illustrate the model.

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