11 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…