Hydrodynamic interactions between a sedimenting squirmer and a planar wall DOI
Henry Shum, D. Palaniappan, Yuan‐Nan Young

et al.

Journal of Fluid Mechanics, Journal Year: 2025, Volume and Issue: 1010

Published: May 9, 2025

The hydrodynamic interactions between a sedimenting microswimmer and solid wall have ubiquitous biological technological applications. A plethora of gravity-induced swimming dynamics near planar no-slip provide platform for designing artificial microswimmers that can generate directed propulsion through their translation–rotation coupling wall. In this work, we exact solutions squirmer (a model swimmer spherical shape with prescribed slip velocity) facing either towards or away from perpendicular to gravity. These are used validate numerical code based on the boundary integral method an adaptive mesh distances down 0.1 % radius. This is then investigate rich wall, mapping out detailed bifurcation structures in terms orientation distance Simulation results show may traverse move fixed point at given height monotonic way oscillatory fashion, oscillate limit cycle presence repulsion.

Language: Английский

Universal Law for the Dispersal of Motile Microorganisms in Porous Media DOI
T. Pietrangeli, Riccardo Foffi, Roman Stocker

et al.

Physical Review Letters, Journal Year: 2025, Volume and Issue: 134(18)

Published: May 9, 2025

Dispersal is essential to the plethora of motile microorganisms living in porous environments, yet how it relates movement patterns and pore space structure remains largely unknown. Here we investigate numerically long-time dispersal a run-and-tumble microorganism that trapped at solid surfaces escapes from them by tumbling. We find mean run time are connected universal relation, applies for variety microstructures swimming strategies. explain this generic dependence originates invariance free path with respect pattern, discuss optimal strategy maximizes dispersal. Finally, extend our approach moving along surface. Our results provide general framework quantify works across vast diversity media.

Language: Английский

Citations

0
Hydrodynamic interactions between a sedimenting squirmer and a planar wall DOI
Henry Shum, D. Palaniappan, Yuan‐Nan Young

et al.

Journal of Fluid Mechanics, Journal Year: 2025, Volume and Issue: 1010

Published: May 9, 2025

The hydrodynamic interactions between a sedimenting microswimmer and solid wall have ubiquitous biological technological applications. A plethora of gravity-induced swimming dynamics near planar no-slip provide platform for designing artificial microswimmers that can generate directed propulsion through their translation–rotation coupling wall. In this work, we exact solutions squirmer (a model swimmer spherical shape with prescribed slip velocity) facing either towards or away from perpendicular to gravity. These are used validate numerical code based on the boundary integral method an adaptive mesh distances down 0.1 % radius. This is then investigate rich wall, mapping out detailed bifurcation structures in terms orientation distance Simulation results show may traverse move fixed point at given height monotonic way oscillatory fashion, oscillate limit cycle presence repulsion.

Language: Английский

Citations

0