313 citations · 914 across the 30 of their papers we have counts for
18 papers · 1 filter
Shape-space dynamics and geometric pattern formation in nonreciprocal slender bodies
Balázs Németh, Mohamed Warda, Ronojoy Adhikari
Nonreciprocal interactions in active solids violate action-reaction symmetry and produce a net response to strain. Assuming invariance under Euclidean symmetries, we derive a shape…
Coupling between Phase Separation and Geometry on a Closed Elastic Curve: Free Energy Minimization and Dynamics
Hanchun Wang, Ronojoy Adhikari, Michael E. Cates
We study the free energy and dynamics of a closed elastic filament (a one-dimensional curve in two dimensions) coupled to a scalar concentration field representing, for example, an…
Elastohydrodynamic instabilities of a soft robotic arm in a viscous fluid
Mohamed Warda, Ronojoy Adhikari
The design and control of soft robots operating in fluid environments requires a careful understanding of the interplay between large elastic body deformations and hydrodynamic for…
Geometric Field Theory for Elastohydrodynamics of Cosserat Rods
Mingjia Yan, Mohamed Warda, Balázs Németh +2
Slender structures are ubiquitous in biological and physical systems, from bacterial flagella to soft robotic arms. The Cosserat rod provides a mathematical framework for slender b…
Nonreciprocal constitutive laws for oriented active solids
Balázs Németh, Takuya Kobayashi, Ronojoy Adhikari
We present an overdamped continuum description of oriented active solids in which interactions respect the symmetries of space but do not obey the principle of action and reaction.…
Paramagnetism in spherically confined charged active matter
Balázs Németh, Ronojoy Adhikari
The celebrated theorem of Bohr and van Leeuwen guarantees that a classical charged system cannot have a magnetization in thermal equilibrium. Quantum mechanically, however, a diama…
Intrinsic Langevin dynamics of rigid inclusions on curved surfaces
Balázs Németh, Ronojoy Adhikari
The stochastic dynamics of a rigid inclusion constrained to move on a curved surface has many applications in biological and soft matter physics, ranging from the diffusion of pass…
Cartan media: geometric continuum mechanics in homogeneous spaces
Lukas Kikuchi, Ronojoy Adhikari
We present a geometric formulation of the mechanics of a field that takes values in a homogeneous space \mathbb{X} on which a Lie group G acts transitively. This generalises the me…
Fluctuating hydrodynamics of an autophoretic particle near a permeable interface
Günther Turk, Ronojoy Adhikari, Rajesh Singh
We study the autophoretic motion of a spherical active particle interacting chemically and hydrodynamically with its fluctuating environment in the limit of rapid diffusion and slo…
Periodic Orbits of Active Particles induced by Hydrodynamic Monopoles
Austen Bolitho, Rajesh Singh, R. Adhikari
Terrestrial experiments on active particles, such as Volvox, involve gravitational forces, torques and accompanying monopolar fluid flows. Taking these into account, we analyse the…
Fluctuating hydrodynamics and the Brownian motion of an active colloid near a wall
Rajesh Singh, R. Adhikari
The traction on the surface of a spherical active colloid in a thermally fluctuating Stokesian fluid contains passive, active, and Brownian contributions. Here we derive these thre…
Irreducible Representations Of Oscillatory And Swirling Flows In Active Soft Matter
Somdeb Ghose, R. Adhikari
Recent experiments imaging fluid flow around swimming microorganisms have revealed complex time-dependent velocity fields that differ qualitatively from the stresslet flow commonly…
Fluctuating Nematodynamics using the Stochastic Method of Lines
A. K. Bhattacharjee, Gautam I. Menon, R. Adhikari
We construct Langevin equations describing the fluctuations of the tensor order parameter in nematic liquid crystals by adding noise terms to time-dependent variational eq…
The Isotropic-Nematic Interface with an Oblique Anchoring Condition
S. M. Kamil, A. K. Bhattacharjee, R. Adhikari +1
We present numerical and analytic results for uniaxial and biaxial order at the isotropic-nematic interface within Ginzburg-Landau-de Gennes theory. We study the case where an obli…
Biaxiality at the Isotropic-Nematic Interface with Planar Anchoring
S. M. Kamil, A. K. Bhattacharjee, R. Adhikari +1
We revisit the classic problem of the structure of the isotropic-nematic interface within Ginzburg-Landau-de Gennes theory, refining previous analytic treatments of biaxiality at t…
Singular forces and point-like colloids in lattice Boltzmann hydrodynamics
R. W. Nash, R. Adhikari, M. E. Cates
We present a second-order accurate method to include arbitrary distributions of force densities in the lattice Boltzmann formulation of hydrodynamics. Our method may be used to rep…
Lattice Boltzmann for Binary Fluids with Suspended Colloids
K. Stratford, R. Adhikari, I. Pagonabarraga +1
A new description of the binary fluid problem via the lattice Boltzmann method is presented which highlights the use of the moments in constructing two equilibrium distribution fun…
Interactions and Correlations of Particulate Inclusions in a Columnar Phase
Ronojoy Adhikari
We calculate the elastic field mediated interaction between macroscopic particles in a columnar hexagonal phase. The interaction is found to be long-ranged and non-central, with bo…