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Motion of a Spot in a Reaction Diffusion System under the Influence of Chemotaxis

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  • Satoshi Kawaguchi

Abstract

We consider the motion of a spot under the influence of chemotaxis. We propose a two-component reaction diffusion system with a global coupling term and a Keller-Segel type chemotaxis term. For the system, we derive the equation of motion of the spot and the time evolution equation of the tensors. We show the existence of an upper limit for the velocity and a critical intensity for the chemotaxis, over which there is no circular motion. The chemotaxis suppresses the range of velocity for the circular motion. This braking effect on velocity originates from the refractory period behind the rear interface of the spot and the negative chemotactic velocity. The physical interpretation of the results and its plausibility are discussed.

Suggested Citation

  • Satoshi Kawaguchi, 2018. "Motion of a Spot in a Reaction Diffusion System under the Influence of Chemotaxis," Advances in Mathematical Physics, Hindawi, vol. 2018, pages 1-24, May.
    • Handle: RePEc:hin:jnlamp:6152961
    DOI: 10.1155/2018/6152961
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