Stationary solutions for some shadow system of the Keller-Segel model with logistic growth
Tohru Tsujikawa - Faculty of Engineering, University of Miyazaki, Miyazaki, 889-2192, Japan (email)
Abstract: From a viewpoint of the pattern formation, the Keller-Segel system with the growth term is studied. This model exhibited various static and dynamic patterns caused by the combination of three effects, chemotaxis, diffusion and growth. In a special case when chemotaxis effect is very strong, some numerical experiment in , showed static and chaotic patterns. In this paper we consider the logistic source for the growth and a shadow system in the limiting case that a diffusion coefficient and chemotactic intensity grow to infinity. We obtain the global structure of stationary solutions of the shadow system in the one-dimensional case. Our proof is based on the bifurcation, singular perturbation and a level set analysis. Moreover, we show some numerical results on the global bifurcation branch of solutions by using AUTO package.
Keywords: Bifurcation, chemotaxis, pattern formation, shadow system.
Received: December 2013; Revised: March 2015; Available Online: July 2015.
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