
arXiv: 2111.03411
We consider a second order PDEs system of Parabolic-Elliptic type with chemotactic terms. The system describes the evolution of a biological species "$u$" moving towards a higher concentration of a chemical stimuli "$v$" in a bounded and open domain of $ \mathcal{R}^N$. In the system considered, the chemotaxis sensitivity depends on the gradient of $v$, i.e., the chemotaxis term has the following expression $$- div \left(χu |\nabla v|^{p-2}\nabla v \right),$$ where $χ$ is a positive constant and $p$ satisfies $$p \in (1, \infty), \quad \mbox{ if } N=1 \quad \mbox{ and } \quad p\in \left(1, \frac{N}{N-1}\right), \quad \mbox{ if } N\geq 2.$$ We obtain uniform bounds in time in $L^{\infty}(Ω)$ of the solutions. For the one-dimensional case we prove the existence of infinitely many non-constant steady-states for $p\in (1,2)$ for any $χ$ positive and a given positive mass.
global existence, PDEs in connection with biology, chemistry and other natural sciences, boundedness, gradient-dependent chemosensitivity, 35B45, Keller-Segel model, Mathematics - Analysis of PDEs, Initial-boundary value problems for second-order parabolic equations, Qualitative investigation and simulation of ordinary differential equation models, FOS: Mathematics, chemotaxis, Analysis of PDEs (math.AP)
global existence, PDEs in connection with biology, chemistry and other natural sciences, boundedness, gradient-dependent chemosensitivity, 35B45, Keller-Segel model, Mathematics - Analysis of PDEs, Initial-boundary value problems for second-order parabolic equations, Qualitative investigation and simulation of ordinary differential equation models, FOS: Mathematics, chemotaxis, Analysis of PDEs (math.AP)
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