Particle-resolved lattice Boltzmann simulations of 3-dimensional active turbulence

D Bárdfalvy, H Nordanger, C Nardini, A Morozov… - Soft Matter, 2019 - pubs.rsc.org
Collective behaviour in suspensions of microswimmers is often dominated by the impact of
long-ranged hydrodynamic interactions. These phenomena include active turbulence …

Mode-coupling theory for tagged-particle motion of active Brownian particles

J Reichert, S Mandal, T Voigtmann - Physical Review E, 2021 - APS
We derive a mode-coupling theory (MCT) to describe the dynamics of a tracer particle that is
embedded in a dense system of active Brownian particles (ABPs) in two spatial dimensions …

Anisotropic diffusion of ellipsoidal tracers in microswimmer suspensions

H Nordanger, A Morozov, J Stenhammar - Physical Review Fluids, 2022 - APS
Tracer particles immersed in suspensions of biological microswimmers such as E. coli or C.
reinhardtii display phenomena unseen in conventional equilibrium systems, including …

Confinement-induced alternating interactions between inclusions in an active fluid

M Zarif, A Naji - Physical Review E, 2020 - APS
In a system of colloidal inclusions suspended in an equilibrium bath of smaller particles, the
particulate bath engenders effective, short-ranged, primarily attractive interactions between …

Evolution of the analytical scattering model of live Escherichia coli

EF Semeraro, L Marx, J Mandl, MPK Frewein… - Applied …, 2021 - journals.iucr.org
A previously reported multi-scale model for (ultra-) small-angle X-ray (USAXS/SAXS) and
(very) small-angle neutron scattering (VSANS/SANS) of live Escherichia coli was revised on …

Dynamic and mechanical evolution of an oil–water interface during bacterial biofilm formation

DP Rivas, ND Hedgecock, KJ Stebe, RL Leheny - Soft Matter, 2021 - pubs.rsc.org
We present an experimental study combining particle tracking, active microrheology, and
differential dynamic microscopy (DDM) to investigate the dynamics and rheology of an oil …

Interplay between Brownian and hydrodynamic tracer diffusion in suspensions of swimming microorganisms

H Nordanger, A Morozov… - Journal of Fluid …, 2023 - cambridge.org
The general problem of tracer diffusion in non-equilibrium baths is important in a wide range
of systems, from the cellular level to geographical length scales. In this paper, we revisit the …

Effective interactions mediated between two permeable disks in an active fluid

M Sebtosheikh, A Naji - Scientific Reports, 2020 - nature.com
We study steady-state properties of a bath of active Brownian particles (ABPs) in two
dimensions in the presence of two fixed, permeable (hollow) disklike inclusions, whose …

Lipid vesicle pools studied by passive X-ray microrheology

T Czajka, C Neuhaus, J Alfken, M Stammer… - The European Physical …, 2023 - Springer
Vesicle pools can form by attractive interaction in a solution, mediated by proteins or divalent
ions such as calcium. The pools, which are alternatively also denoted as vesicle clusters …

Effective temperature scaled dynamics of a flexible polymer in an active bath

X Cao, B Zhang, N Zhao - Molecular Physics, 2020 - Taylor & Francis
Langevin dynamics simulations are employed to study the dynamical properties of a flexible
polymer in an active bath. The diffusion of the centre of mass and end-to-end distance …