28 citations · 360 across the 26 of their papers we have counts for
14 papers · 1 filter
Imbibition dynamics under dissolution-driven fluid thickening
H. W. Almeida, A. F. V. Matias, R. C. V. Coelho +1
The imbibition of milk into a biscuit provides an example of a broader class of processes in which a liquid invades a porous material, dissolving components of the solid and thereb…
Lattice Boltzmann simulation of deformable fluid-filled bodies: progress and perspectives
Danilo P. F. Silva, Rodrigo C. V. Coelho, Ignacio Pagonabarraga +3
With the rapid development of studies involving droplet microfluidics, drug delivery, cell detection, and microparticle synthesis, among others, many scientists have invested signi…
Sculpting liquid crystal skyrmions with external flows
Rodrigo C. V. Coelho, Hanqing Zhao, Mykola Tasinkevych +2
We investigate, using experiments and numerical simulations, the distortions and the alignment of skyrmions in the liquid crystal under external flows for a range of average flow v…
Active nematics on flat surfaces: from droplet motility and scission to active wetting
Rodrigo C. V. Coelho, Hélio R. J. C. Figueiredo, Margarida M. Telo da Gama
We consider the dynamics of active nematics droplets on flat surfaces, based on the continuum hydrodynamic theory. We investigate a wide range of dynamical regimes as a function of…
Dispersion of activity at an active-passive nematic interface
Rodrigo C. V. Coelho, Nuno A. M. Araújo, Margarida M. Telo da Gama
Efficient nutrient mixing is crucial for the survival of bacterial colonies and other living systems. This raises the question of whether the optimization of mixing through the eme…
Dynamics of two-dimensional liquid bridges
Rodrigo C. V. Coelho, Luis A. R. G. Cordeiro, Rodrigo B. Gazola +1
We have simulated the motion of a single vertical, two-dimensional liquid bridge spanning the gap between two flat, horizontal solid substrates of given wettabilities, using a mult…
Dynamics of flowing 2D skyrmions
Rodrigo C. V. Coelho, Mykola Tasinkevych, Margarida M. Telo da Gama
We investigate, numerically, the effects of externally imposed material flows on the structure and temporal evolution of liquid crystal skyrmions. The dynamics of a 2D system of sk…
Effect of particle deformability on shear thinning in a 3D channel
Danilo P. F. Silva, Rodrigo C. V. Coelho, Margarida M. Telo da Gama +1
Soft particles suspended in fluids flowing through microchannels are often encountered in biological flows such as cells in vessels. They can deform under flow or when subject to m…
Director alignment at the nematic-isotropic interface: elastic anisotropy and active anchoring
Rodrigo C. V. Coelho, Nuno A. M. Araújo, Margarida M. Telo da Gama
Activity in nematics drives interfacial flows that lead to preferential alignment that is tangential or planar for extensile systems (pushers) and perpendicular or homeotropic for…
Propagation of active nematic-isotropic interfaces on substrates
Rodrigo C. V. Coelho, Nuno A. M. Araújo, Margarida M. Telo da Gama
Motivated by results for the propagation of active-passive interfaces of bacterial Serratia marcescens swarms [Nat. Comm., 9, 5373 (2018)] we use a hydrodynamic multiphase model to…
Lattice-Boltzmann simulation of free nematic-isotropic interfaces
Rodrigo C. V. Coelho, Nuno A. M. Araújo, Margarida M. Telo da Gama
We use a hybrid method of lattice Boltzmann and finite differences to simulate flat and curved interfaces between the nematic and isotropic phases of a liquid crystal described by…
Active nematic-isotropic interfaces in channels
Rodrigo C. V. Coelho, Nuno A. M. Araújo, Margarida M. Telo da Gama
We use numerical simulations to investigate the hydrodynamic behavior of the interface between nematic (N) and isotropic (I) phases of a confined active liquid crystal. At low acti…
Dynamical demixing of a binary mixture under sedimentation
A. S. Nunes, R. C. V. Coelho, V. C. Braz +2
We investigate the sedimentation dynamics of a binary mixture, the species of which differ by their Stokes coefficients but are identical otherwise. We analyze the sedimentation dy…
Kelvin-Helmholtz instability of the Dirac fluid of charge carriers on graphene
Rodrigo C. V. Coelho, Miller Mendoza, Mauro M. Doria +1
We provide numerical evidence that a Kelvin-Helmholtz instability occurs in the Dirac fluid of electrons in graphene and can be detected in current experiments. This instability ap…