Surface tension coupled non-uniformly imposed flows modulate the activity of reproducing chemotactic bacteria in porous media.

ABSTRACT: This paper investigates a non-homogeneous two-dimensional model for reproducing chemotactic bacteria, immersed in a porous medium that experiences non-uniformly imposed flows. It is shown that independently of the form of the fluid velocity field, the compressible/incompressible nature of the fluid significantly shifts the Turing stability-instability transition line. In dry media, Gaussian perturbations travel faster than the hyperbolic secant ones, yet the latter exhibit better stability properties. The system becomes highly unstable under strong flows and high surface tension. Approximated solutions recovered by injecting Gaussian perturbations overgrow, in addition to triggering concentric breathing features that split the medium into high and low-density domains. Secant perturbations

SUBMITTER: Kuipou W 

PROVIDER: S-EPMC10076314 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature