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Journal of Applied Nonlinear Dynamics
Miguel A. F. Sanjuan (editor), Albert C.J. Luo (editor)
Miguel A. F. Sanjuan (editor)

Department of Physics, Universidad Rey Juan Carlos, 28933 Mostoles, Madrid, Spain

Email: miguel.sanjuan@urjc.es

Albert C.J. Luo (editor)

Department of Mechanical and Industrial Engineering, Southern Illinois University Ed-wardsville, IL 62026-1805, USA

Fax: +1 618 650 2555 Email: aluo@siue.edu


Blow-up and Lower Bounds of Solutions to a Two-Species Keller-Segel Chemotaxis Model in $mathbb{R}^2$

Journal of Applied Nonlinear Dynamics 15(1) (2026) 97--109 | DOI:10.5890/JAND.2026.03.006

G. Sathishkumar$^{1}$, L. Shangerganesh$^2$, S. Karthikeyan$^3$, J.J. Nieto$^4$

$^1$ Department of Mathematics, Faculty of Science and Humanities, SRM Institute of Science and Technology, Chennai Ramapuram, Tamil Nadu, 600 089, India

$^2$ Department of Applied Sciences, National Institute of Technology Goa, Cuncolim, Goa, 403 703, India

$^3$ Department of Mathematics, Periyar University, Salem, Tamil Nadu, 636 011, India

$^4$ CITMAga, Departamento de Estat'istica, An'alise Matem'atica e Optimizaci'on, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain

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Abstract

This paper investigates the blow-up phenomena of non-negative solutions of a two-species Keller-Segel chemotaxis model with the Lotka-Volterra competitive source terms under Neumann boundary conditions in a bounded domain $\Omega\subset\mathbb{R}^2$ with smooth boundary. We establish the results for the finite time blow-up of solutions when $\frac{\chi_1}{\alpha}=\frac{\chi_2}{\beta}$ for some positive constants $\alpha$ and $\beta$. The concavity method determines the main result in a two-dimensional space domain with a suitable auxiliary function. Also, the lower bounds for the finite time blow-up of solutions using the differential inequality techniques are estimated.

Acknowledgments

The authors declare that they have no conflict of interest.

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