9 citations · 18 across the 13 of their papers we have counts for
13 papers
A diffuse-interface theory of active nematic interfaces: transport mechanisms and modal structure
Rodrigo C. V. Coelho, Mykola Tasinkevych, Margarida M. Telo da Gama
We develop a long-wavelength theory for the linear stability of a flat interface between an active nematic and an isotropic fluid. Starting from a diffuse-interface Cahn--Hilliard-…
Porosity and Material Disorder Drive Distinct Channelization Transition
André F. V. Matias, Rodrigo C. V. Coelho, Humberto A. Carmona +2
Flow through porous media can reshape the medium through erosion and deposition, producing preferential flow channels across a wide range of natural and industrial systems. Yet the…
Spatiotemporal crystallization of an active fluid
Olga Bantysh, Ramon Reigada, Rodrigo C. V. Coelho +3
The emergence of long-range spatiotemporal order from intrinsic chaos is a central challenge in far-from-equilibrium physics. In active fluids, such as cytoskeletal networks drivin…
Soft Colloidal Robots: Magnetically Guided Liquid Crystal Torons for Targeted Micro-Cargo Delivery
Joel Torres, Rodrigo C. V. Coelho, Patrick Oswald +2
Quasiparticles in liquid crystals, such as torons and skyrmions, represent a new class of topologically protected solitonic excitations, offering a promising route toward soft micr…
Spontaneous rotation and propulsion of suspended capsules in active nematics
Júlio P. A. Santos, Margarida M. Telo da Gama, Rodrigo C. V. Coelho
We investigate the dynamics of elastic capsules suspended in two-dimensional active nematic fluids using lattice Boltzmann simulations. The capsules, modeled as flexible membranes…
Shape transitions of sedimenting confined droplets and capsules: from oblate to bullet-like geometries
Danilo P. F. Silva, Rodrigo C. V. Coelho, Ariel Dvir +4
The transport and deformation of confined droplets and flexible capsules are central to diverse phenomena and applications, from biological flows in microcapillaries to industrial…
Phase Separation in Mixtures of Nematic and Isotropic Fluids
Margarida M. Telo da Gama, Rodrigo C. V. Coelho
Mixtures of nematic liquid crystals and isotropic fluids display a diverse range of phase behaviors, arising from the coupling between orientational order and concentration fluctua…
Efficient single-precision simulations of nematohydrodynamics
Guilherme N. C. Amaral, Mahmoud Sedahmed, Margarida M. Telo da Gama +1
Simulations of nematohydrodynamics on graphics processing units (GPUs) are typically performed using double precision, which ensures accuracy but significantly increases computatio…
Solute dispersion in pre-turbulent confined active nematics
Tomás Alvim, Margarida M. Telo da Gama, Rodrigo C. V. Coelho
We investigate the dispersion of solutes in active nematic fluids confined in narrow channels based on simulations of nematohydrodynamics. The study focuses on two pre-turbulent re…
Liquid crystal torons in Poiseuille-like flows
Guilherme N. C. Amaral, Hanqing Zhao, Mahmoud Sedahmed +5
Three-dimensional (3D) simulations of the structure of liquid crystal (LC) torons, topologically protected distortions of the LC director field, under material flows are rare but e…
Wetting and pressure gradient performance in a lattice Boltzmann color gradient model
Mahmoud Sedahmed, Rodrigo C. V. Coelho
An accurate implementation of wetting and pressure drop is crucial to correctly reproducing fluid displacement processes in porous media. Although several strategies have been prop…
"Hall" transport of liquid crystal solitons in Couette flow
Rodrigo C. V. Coelho, Hanqing Zhao, Guilherme N. C. Amaral +3
Topology establishes a unifying framework for a diverse range of scientific areas including particle physics, cosmology, and condensed matter physics. One of the most fascinating m…
Active nematic-isotropic interfaces on flat surfaces: effects of anchoring, ordering field and activity
Rodrigo C. V. Coelho, José A. Moreira, Duarte M. C. Pedro +1
A surface in contact with the isotropic phase of a passive liquid crystal can induce nematic order over distances that range from microscopic to macroscopic when the nematic-isotro…