The Mathematical Institute, University of Oxford, Eprints Archive

Travelling waves in hyperbolic chemotaxis equations

Xue, C. and Hwang, H. J. and Painter, K. J. and Erban, R. (2010) Travelling waves in hyperbolic chemotaxis equations. Bulletin of Mathematical Biology . ISSN 0092-8240 (Submitted)

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Abstract

Mathematical models of bacterial populations are often written as systems of partial differential equations for the densities of bacteria and concentrations of extracellular (signal) chemicals. This approach has been employed since the seminal work of Keller and Segel in the 1970s [Keller and Segel, J. Theor. Biol., 1971]. The system has been shown to permit travelling wave solutions which correspond to travelling band formation in bacterial colonies, yet only under specific criteria, such as a singularity in the chemotactic sensitivity function as the signal approaches zero. Such a singularity generates infinite macroscopic velocities which are biologically unrealistic. In this paper, we formulate a model that takes into consideration relevant details of the intracellular processes while avoiding the singularity in the chemotactic sensitivity. We prove the global existence of solutions and then show the existence of travelling wave solutions both numerically and analytically.

Item Type:Article
Subjects:D - G > General
Research Groups:Oxford Centre for Collaborative Applied Mathematics
ID Code:986
Deposited By:Peter Hudston
Deposited On:26 Oct 2010 10:27
Last Modified:09 Feb 2012 16:01

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