Boundary layer problem on chemotaxis-Navier-Stokes system with Robin boundary conditions

Qianqian Hou

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arXiv · 2205.08049

Boundary layer problem on chemotaxis-Navier-Stokes system with Robin boundary conditions

Qianqian Hou

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Abstract

This paper is concerned with the boundary layer problem on a chemotaxis-Navier-Stokes system modelling boundary layer formation of aerobic bacteria in fluid. Completing the system with physical Robin-type boundary conditions for oxygen, no-flux and Dirichlet boundary conditions for bacteria and fluid velocity, we show that the gradients of its radial solutions in a region between two concentric spheres possessing boundary layer effects as the oxygen diffusion rate $\varepsilon$ goes to zero and the boundary-layer thickness is of order $\mathcal{O}(\varepsilon^\alpha)$ with $0<\alpha<\frac{1}{2}$.

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Qianqian Hou. 2022-05-17. Boundary layer problem on chemotaxis-Navier-Stokes system with Robin boundary conditions. https://arxiv.org/abs/2205.08049

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