Long-term behaviour in a parabolic-elliptic chemotaxis-consumption model

Abstract: Global existence and boundedness of classical solutions of the chemotaxis--consumption system \begin{align*} n_t &= \Delta n - \nabla \cdot (n \nabla c), \ 0 &= \Delta c - nc, \end{align*} under no-flux boundary conditions for $n$ and Robin-type boundary conditions [ \partial_{\nu} c = (\gamma-c) g ] for $c$ (with $\gamma>0$ and $C^{1+\beta}(\partial\Omega) \ni g > 0$ for some $\beta\in(0,1)$) are established in bounded domains $\Omega\subset\mathbb{R}^{N}$, $N\ge 1$. Under a smallness condition on $\gamma$, moreover, we show convergence to the stationary solution.