Active osmotic-like pressure on permeable inclusions

Abstract

We use a standard minimal active Brownian model to investigate the osmotic-like effective pressure generated by active fluids on fixed hollow inclusions. These inclusions are enclosed by a permeable (albeit nonflexible) membrane, and the interior and exterior regions of the inclusions have different particle motility strengths. We consider both rectangular and disklike inclusions and analyze the effects of various system parameters, such as excluded volume interaction between active particles, hardness of membrane and active particle density, on the effective pressure produced on the enclosing membrane. We focus on the range of intermediate to high motility strengths and analyze the effective pressure in the steady state. Our findings for the active pressure produced in the interior and exterior regions of the inclusion indicate that the pressure is higher in the region with lower motility due to the relatively stronger accumulation of active particles.

References in corpus (42)

• Active Particles in Complex and Crowded Environments
• Collective motion
• Motility-Induced Phase Separation
• Physics of Microswimmers - Single Particle Motion and Collective Behavior
• Pressure is not a state function for generic active fluids
• Growth and Division of Active Droplets: A Model for Protocells
• Emergent behavior in active colloids
• Pressure and Phase Equilibria in Interacting Active Brownian Spheres
• Flocking at a distance in active granular matter
• Phototaxis of synthetic microswimmers in optical landscapes
• Self-Propelled Rods: Insights and Perspectives for Active Matter
• Towards a 'Thermodynamics' of Active Matter
• Sculpting vesicles with active particles: Less is more
• Negative interfacial tension in phase-separated active suspensions
• Generalized thermodynamics of Motility-Induced Phase Separation: Phase equilibria, Laplace pressure, and change of ensembles
• Tunable long range forces mediated by self-propelled colloidal hard spheres
• Theories of Binary Fluid Mixtures: From Phase-Separation Kinetics to Active Emulsions
• Light-induced self-assembly of active rectification devices
• Collective behavior of penetrable self-propelled rods in two dimensions
• Anomalous Thermomechanical Properties of a Self-propelled Colloidal Fluid
• Swim pressure on walls with curves and corners
• Shape and Displacement Fluctuations in Soft Vesicles Filled by Active Particles
• Controlling active self-assembly through broken particle symmetries
• Microscopic Origins of the Swim Pressure and the Anomalous Surface Tension of Active Matter
• Curvature-dependent tension and tangential flows at the interface of motility-induced phases
• Active Brownian particles near straight or curved walls: Pressure and boundary layers
• Shape Transformations of Vesicles induced by Swim Pressure
• Vesicle shape transformations driven by confined active filaments
• Universal scaling in active single-file dynamics
• Effective interactions between inclusions in an active bath
• Deformation of a soft boundary induced and enhanced by enclosed active particles
• Pressure in an exactly solvable model of active fluid
• Trapping of interacting propelled colloidal particles in inhomogeneous media
• Membrane penetration and trapping of an active particle
• Active particles with polar alignment in ring-shaped confinement
• Boids in a Loop: Self-Propelled particles within a Flexible Boundary
• Active fluids at circular boundaries: Swim pressure and anomalous droplet ripening
• Spontaneous membrane formation and self-encapsulation of active rods in an inhomogeneous motility field
• Confinement-induced alternating interactions between inclusions in an active fluid
• Theory of active particle penetration through a planar elastic membrane
• Effective interactions mediated between two permeable disks in an active fluid
• Asymmetric and Long Range Interactions in Shaken Granular Media