Abstract
We consider in this paper numerical approximation and simulation of a two-species Keller-Segel model. The model enjoys an energy dissipation law, mass conservation and bound or positivity preserving for the population density of two species. We construct a class of very efficient numerical schemes based on the generalized scalar auxiliary variable with relaxation which preserve unconditionally the essential properties of the model at the discrete level. We conduct a sequence of numerical tests to validate the properties of these schemes, and to study the blow-up phenomena of the model in a three-dimensional domain in parabolic-elliptic form and parabolic-parabolic form.
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Notes
In the particular case with \(\tau =\alpha =0\), the equation (1.3) should be adjusted to \(-\beta \Delta c = \gamma _{1}\rho _{1}+ \gamma _{2}\rho _{2} - \gamma _{1} \langle \rho _{1} \rangle - \gamma _{2} \langle \rho _{2} \rangle \) with \(\langle \rho _{i} \rangle = \frac{1}{| \Omega |} \int _{\Omega} \rho _{i} d\boldsymbol{x}\) (\(i=1,2\)), due to the compatibility with the boundary conditions involved [23, 29].
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This work is supported in part by NSFC grant 12371409.
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Dedicated to Professor Shi Jin’s 60th Birthday
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Huang, X., Shen, J. Efficient Numerical Schemes for a Two-Species Keller-Segel Model and Investigation of Its Blowup Phenomena in 3D. Acta Appl Math 190, 10 (2024). https://doi.org/10.1007/s10440-024-00647-0
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DOI: https://doi.org/10.1007/s10440-024-00647-0