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Morphology of active deformable 3D droplets
Liam J. Ruske, Julia M. Yeomans
We numerically investigate the morphology and disclination line dynamics of active nematic droplets in three dimensions. Although our model only incorporates the simplest possible…
Memory effects, arches and polar defect ordering at the cross-over from wet to dry active nematics
Mehrana Raeisian Nejad, Amin Doostmohammadi, Julia Mary Yeomans
We use analytic arguments and numerical solutions of the continuum, active nematohydrodynamic equations to study how friction alters the behaviour of active nematics. Concentrating…
Bacteria solve the problem of crowding by moving slowly
Oliver J. Meacock, Amin Doostmohammadi, Kevin R. Foster +2
In systems as diverse as migrating mammals to road traffic, crowding acts to inhibit efficient collective movement. Bacteria, however, are observed to move in very dense groups con…
Flow states and transitions of an active nematic in a three dimensional channel
Santhan Chandragiri, Amin Doostmohammadi, Julia M. Yeomans +1
We use active nematohydrodynamics to study the flow of an active fluid in a 3D microchannel, finding a transition between active turbulence and regimes where there is a net flow al…
Active Inter-cellular Forces in Collective Cell Motility
Guanming Zhang, Romain Mueller, Amin Doostmohammadi +1
The collective behaviour of confluent cell sheets is strongly influenced both by polar forces, arising through cytoskeletal propulsion and by active inter-cellular forces, which ar…
Role of friction in multidefect ordering
Kristian Thijssen, Mehrana R. Nejad, Julia M. Yeomans
We use continuum simulations to study the impact of friction on the ordering of defects in an active nematic. Even in a frictionless system, +1/2 defects tend to align side-by-side…