317 citations · 1.2k across the 30 of their papers we have counts for
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Hydrodynamic instabilities in a 2-D sheet of microswimmers embedded in a 3-D fluid
Viktor Škultéty, Dóra Bárdfalvy, Joakim Stenhammar +2
A collection of microswimmers immersed in an incompressible fluid is characterised by strong interactions due to the long-range nature of the hydrodynamic fields generated by indiv…
Interplay between Brownian and hydrodynamic tracer diffusion in suspensions of swimming microorganisms
Henrik Nordanger, Alexander Morozov, Joakim Stenhammar
The general problem of tracer diffusion in non-equilibrium baths is important in a wide range of systems, from the cellular level to geographical lengthscales. In this paper, we re…
Active turbulence and spontaneous phase separation in inhomogeneous extensile active gels
Renato Assante, Dom Corbett, Davide Marenduzzo +1
We report numerical results for the hydrodynamics of inhomogeneous lyotropic and extensile active nematic gels. By simulating the coupled Cahn-Hilliard, Navier-Stokes, and Beris-Ed…
Yield-stress transition in suspensions of deformable droplets
Giuseppe Negro, Livio Nicola Carenza, Giuseppe Gonnella +3
Yield-stress materials, which require a sufficiently large forcing to flow, are currently ill-understood theoretically. To gain insight into their yielding transition, here we stud…
Polymers in Swarming Bacterial Turbulence
Ranjiangshang Ran, David A. Gagnon, Alexander Morozov +1
We experimentally investigate the effects of polymer additives on the collective dynamics of swarming Serratia marcescens in quasi two-dimensional (2D) liquid films. We find that e…
Anisotropic diffusion of ellipsoidal tracers in microswimmer suspensions
Henrik Nordanger, Alexander Morozov, Joakim Stenhammar
Tracer particles immersed in suspensions of biological microswimmers such as E. coli or C. reinhardtii display phenomena unseen in conventional equilibrium systems, including stron…
Electrostatic inactivation of RNA viruses at air-water and liquid-liquid interfaces
C. A. Brackley, A. Lips, A. Morozov +2
Understanding the interactions between viruses and surfaces or interfaces is important, as they provide the principles underpinning the cleaning and disinfection of contaminated su…
Pattern formation in active model C with anchoring: bands, aster networks, and foams
Ivan Maryshev, Alexander Morozov, Andrew B. Goryachev +1
We study the dynamics of pattern formation in a minimal model for active mixtures made of microtubules and molecular motors. We monitor the evolution of the (conserved) microtubule…
Symmetric mixtures of pusher and puller microswimmers behave as noninteracting suspensions
Dóra Bárdfalvy, Shan Anjum, Cesare Nardini +2
Suspensions of rear- and front-actuated microswimmers immersed in a fluid, known respectively as ``pushers'' and ``pullers'', display qualitatively different collective behaviours:…
Swimming suppresses correlations in dilute suspensions of pusher microorganisms
Viktor Škultéty, Cesare Nardini, Joakim Stenhammar +2
Active matter exhibits various forms of non-equilibrium states in the absence of external forcing, including macroscopic steady-state currents. Such states are often too complex to…
Debye-Hückel potential at an interface between two media
Alexander Morozov, Iain Muntz, Job H. J. Thijssen +1
Electrostatic interactions between point charges embedded into interfaces separating dielectric media are omnipresent in soft matter systems and often control their stability. Such…
Particle-resolved lattice Boltzmann simulations of 3-dimensional active turbulence
Dora Bardfalvy, Henrik Nordanger, Cesare Nardini +2
Collective behaviour in suspensions of microswimmers is often dominated by the impact of long-ranged hydrodynamic interactions. These phenomena include active turbulence, where sus…
Rheology and microrheology of deformable droplet suspensions
M. Foglino, A. N. Morozov, D. Marenduzzo
Dense suspensions of soft colloidal particles display a broad range of physical and rheological properties which are still far from being fully understood. To elucidate the role of…
Dry active turbulence in microtubule-motor mixtures
Ivan Maryshev, Andrew B. Goryachev, Davide Marenduzzo +1
We study the dynamics and phase behaviour of a dry suspension of microtubules and molecular motors. We obtain a set of continuum equations by rigorously coarse graining a microscop…
Density Dependent Cohesion Leads to Controlled Phase Separation in Brownian Suspensions
Gavin Melaugh, Davide Marenduzzo, Alexander Morozov +1
Mechanical interactions between biological cells may be mediated by secreted products, making them dependent on the local particle density. Here, we explore the generic physics of…
Kinetic theory of pattern formation in mixtures of microtubules and molecular motors
Ivan Maryshev, Davide Marenduzzo, Andrew B. Goryachev +1
In this study we formulate a theoretical approach, based on a Boltzmann-like kinetic equation, to describe pattern formation in two-dimensional mixtures of microtubular filaments a…
The role of correlations in the collective behaviour of microswimmer suspensions
Joakim Stenhammar, Cesare Nardini, Rupert W. Nash +2
In this Letter, we study the collective behaviour of a large number of self-propelled microswimmers immersed in a fluid. Using unprecedently large-scale lattice Boltzmann simulatio…
Filling an emulsion drop with motile bacteria
I. D. Vladescu, E. J. Marsden, J. Schwarz-Linek +6
We have measured the spatial distribution of motile Escherichia coli inside spherical water droplets emulsified in oil. At low cell concentrations, the cell density peaks at the wa…
Enhanced diffusion of tracer particles in dilute bacterial suspensions
Alexander Morozov, Davide Marenduzzo
Swimming bacteria create long-range velocity fields that stir a large volume of fluid and move around passive particles dispersed in the fluid. Recent experiments and simulations h…
Phase separation and rotor self-assembly in active particle suspensions
J. Schwarz-Linek, C. Valeriani, A. Cacciuto +4
Adding a non-adsorbing polymer to passive colloids induces an attraction between the particles via the `depletion' mechanism. High enough polymer concentrations lead to phase separ…