Turkish Journal of Computer and Mathematics Education
Journal license

Journal

Turkish Journal of Computer and Mathematics Education


Volume
& Issue

Volume 11, Issue 3


Published
on


Pages

2723-2738


DOI

Article

Travelling Waves in Hybrid Chemotaxis Models


Authors

Raju Baradi Affiliation:
Assistant Professor, Department of Mathematics, Kshatriya College of Engineering
, Srinivas Boga Affiliation:
Assistant Professor, Department of Mathematics, Kshatriya College of Engineering
and Narendra Bandari Affiliation:
Assistant Professor, Department of Mathematics, Kshatriya College of Engineering


Abstract

Hybrid models of chemotaxis combine agent-based models of cells with partial differential equation models of extracellular chemical signals. In this paper, travelling wave properties of hybrid models of bacterial chemotaxis are investigated. Bacteria are modelled using an agent-based (individual-based) approach with internal dynamics describing signal transduction. In addition to the chemotactic behaviour of the bacteria, the individual-based model also includes cell proliferation and death. Cells consume the extracellular nutrient field (chemoattractant) which is modelled using a partial differential equation. Mesoscopic and macroscopic equations representing the behaviour of the hybrid model are derived and the existence of travelling wave solutions for these models is established. It is shown that cell proliferation is necessary for the existence of non-transient (stationary) travelling waves in hybrid models. Additionally, a numerical comparison between the wave speeds of the continuum models and the hybrid models shows good agreement in the case of weak chemotaxis and qualitative agreement for the strong chemotaxis case. In the case of slow cell adaptation, we detect oscillating behaviour of the wave, which cannot be explained by mean-field approximations.


Keywords

hybrid model, travelling wave, bacterial chemotaxis


Citation

Baradi, R., Boga, S., & Bandari, N. (2020). Travelling waves in hybrid chemotaxis models. Turkish Journal of Computer and Mathematics Education, 11(3), 2723–2738.

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