28 citations · 360 across the 26 of their papers we have counts for
27 papers
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…
Continuum model for extraction and retention in porous media
André F. V. Matias, Daniel F. Valente-Matias, Nuno R. Neng +4
Several natural and industrial processes involve the extraction or retention of a solute by a fluid invading a network of channels. Examples include aquifer contamination, chemical…
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…
Collective transport of droplets through porous media
Rodrigo C. V. Coelho, Danilo P. F. Silva, António M. R. Maschio +2
The flow of deformable particles, such as droplets, dragged by a fluid, through a network of narrow pores inside rocks or other porous media is key in a range of applications, from…
Study of fluid displacement in 3D porous media with an improved multi-component pseudopotential lattice Boltzmann method
M. Sedahmed, R. C. V. Coelho, N. A. M. Araújo +2
We generalize to three dimensions (3D) a recently developed improved multi-component pseudopotential lattice Boltzmann method and analyze its applicability to simulate flows throug…
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…
An improved multicomponent pseudopotential lattice Boltzmann method for immiscible fluid displacement in porous media
M. Sedahmed, R. C. V. Coelho, H. A. Warda
Immiscible fluid displacement in porous media occurs in several natural and industrial processes. For example, during petroleum extraction from porous rock reservoirs, water is use…
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…
Flow through time-evolving porous media: swelling and erosion
André F. V. Matias, Rodrigo C. V. Coelho, José S. Andrade +1
The flow through a porous medium strongly depends on the boundary conditions, very often assumed to be static. Here, we consider changes in the medium due to swelling and erosion a…
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…
Wetting boundary conditions for multicomponent pseudopotential lattice Boltzmann
Rodrigo C. V. Coelho, Catarina B. Moura, Margarida M. Telo da Gama +1
The implementation of boundary conditions is among the most challenging parts of modeling fluid flow through channels and complex media. Here, we show that the existing methods to…
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…
Lattice Boltzmann method for semiclassical fluids
Rodrigo C. V. Coelho, Mauro M. Doria
We determine properties of the lattice Boltzmann method for semiclassical fluids, which is based on the Boltzmann equation and the equilibrium distribution function is given either…
Fully dissipative relativistic lattice Boltzmann method in two dimensions
Rodrigo C. V. Coelho, Miller Mendoza, Mauro M. Doria +1
In this paper, we develop and characterize the fully dissipative Lattice Boltzmann method for ultra-relativistic fluids in two dimensions using three equilibrium distribution funct…
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…
Chebyshev, Legendre, Hermite and other orthonormal polynomials in D-dimensions
Mauro M. Doria, Rodrigo C. V. Coelho
We propose a general method to construct symmetric tensor polynomials in the D-dimensional Euclidean space which are orthonormal under a general weight. The D-dimensional Hermite p…
Fluid dynamics in porous media with Sailfish
Rodrigo C. V. Coelho, Rodrigo F. Neumann
In this work we show the application of Sailfish to the study of fluid dynamics in porous media. Sailfish is an open-source software based on the lattice-Boltzmann method. This app…