Layered aquatic microenvironments control fluctuations generated by active carpets DOI Creative Commons
Felipe A. Barros, Hugo N. Ulloa, Gabriel Aguayo

et al.

Physical Review Research, Journal Year: 2025, Volume and Issue: 7(1)

Published: Feb. 12, 2025

In Earth's aquatic environments and the human body, microbial swimmers often accumulate at interfaces within layered systems, forming colonies known as . These bioactive layers enhance mass transport diffusion in fluid media. Here we study hydrodynamic behavior induced by confined semi-infinite layers, such one found sea surface microlayer. By deriving analytical expressions performing numerical simulations, explore how geometrical viscous confinement (layer thickness viscosity ratio) influence fluctuations passive tracer dynamics. Our findings reveal anisotropic distributions of fluctuations, characterized three distinct regions: near fluid-fluid interface (Region I), vertical dominate; an intermediate region II), become isotropic; free III), horizontal prevail. The results also demonstrate emergence coherent vortical structures highly with roll-like patterns governed layer sharpness transitions. insights provided this work have implications for understanding biogenic flow processes natural engineered environments, offering potential applications areas ecology, biofilm management, microfluidic technologies. Published American Physical Society 2025

Language: Английский

Layered aquatic microenvironments control fluctuations generated by active carpets DOI Creative Commons
Felipe A. Barros, Hugo N. Ulloa, Gabriel Aguayo

et al.

Physical Review Research, Journal Year: 2025, Volume and Issue: 7(1)

Published: Feb. 12, 2025

In Earth's aquatic environments and the human body, microbial swimmers often accumulate at interfaces within layered systems, forming colonies known as . These bioactive layers enhance mass transport diffusion in fluid media. Here we study hydrodynamic behavior induced by confined semi-infinite layers, such one found sea surface microlayer. By deriving analytical expressions performing numerical simulations, explore how geometrical viscous confinement (layer thickness viscosity ratio) influence fluctuations passive tracer dynamics. Our findings reveal anisotropic distributions of fluctuations, characterized three distinct regions: near fluid-fluid interface (Region I), vertical dominate; an intermediate region II), become isotropic; free III), horizontal prevail. The results also demonstrate emergence coherent vortical structures highly with roll-like patterns governed layer sharpness transitions. insights provided this work have implications for understanding biogenic flow processes natural engineered environments, offering potential applications areas ecology, biofilm management, microfluidic technologies. Published American Physical Society 2025

Language: Английский

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