A Drop of Active Matter

Abstract

We study theoretically the hydrodynamics of a fluid drop containing oriented filaments endowed with active contractile or extensile stresses and placed on a solid surface. The active stresses alter qualitatively the wetting properties of the drop, leading to new spreading laws and novel static drop shapes. Candidate systems for testing our predictions include cytoskeletal extracts with motors and ATP, suspensions of bacteria or pulsatile cells, or fluids laden with artificial self-propelled colloids.

submitted to J Fluid Mech

References in corpus (11)

• The hydrodynamics of swimming microorganisms
• Self-motile colloidal particles: from directed propulsion to random walk
• The Mechanics and Statistics of Active Matter
• Effective viscosity of microswimmer suspensions
• Shearing active gels close to the isotropic-nematic transition
• Generic phase diagram of active polar films
• Complex Spontaneous Flows and Concentration Banding in Active Polar Films
• Rheology of Active Filament Solutions
• Instabilities and waves in thin films of living fluids
• A Lattice-Boltzmann model for suspensions of self-propelling colloidal particles
• Shaking-induced motility in suspensions of soft active particles

Cited by in corpus (28)

• Biphasic, Lyotropic, Active Nematics
• A minimal physical model captures the shapes of crawling cells
• Dynamics of active liquid interfaces
• Periodic migration in a physical model of cells on micropatterns
• Lattice Boltzmann Methods and Active Fluids
• Onsager's variational principle in active soft matter
• Directional self-locomotion of active droplets enabled by nematic environment
• Enzyme-enriched condensates show self-propulsion, positioning, and coexistence
• Phase Behavior of Active Swimmers in Depletants: Molecular Dynamics and Integral Equation Theory
• Vortex formation and dynamics of defects in shells of active nematics
• Optimal transport and control of active drops
• Motility of active fluid drops on surfaces
• Instabilities, motion and deformation of active fluid droplets
• Thin-Film Modelling of Resting and Moving Active Droplets
• Tractionless Self-Propulsion of Active Drops
• Fingering Instability of Active Nematic Droplets
• How many ways a cell can move: the modes of self-propulsion of an active drop
• Self-consistent sharp interface theory of active condensate dynamics
• Asymmetric fluctuations and self-folding of active interfaces
• Symmetry-breaking, motion and bistability of active drops through polarization-surface coupling
• Thin film models for active gels
• Polarisation of cells and soft objects driven by mechanical interactions: Consequences for migration and chemotaxis
• Scalable marginalization of correlated latent variables with applications to learning particle interaction kernels
• Active Young-Dupré Equation: How Self-organized Currents Stabilize Partial Wetting
• Effects of spatially-varying substrate anchoring on instabilities and dewetting of thin Nematic Liquid Crystal films
• Shape and size changes of adherent elastic epithelia
• What is active wetting?
• Probing wetting properties with self-propelled droplets