Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Coelho, Rodrigo C V"'
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 regimes: oscillatory flow, with net mass flux, and dancing flow, without
Externí odkaz:
http://arxiv.org/abs/2410.04629
Autor:
Amaral, Guilherme N. C., Zhao, Hanqing, Sedahmed, Mahmoud, Campante, Tomás, Smalyukh, Ivan I., Tasinkevych, Mykola, da Gama, Margarida M. Telo, Coelho, Rodrigo C. V.
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 essential in microfluidic applications. Here, we show that torons adopt
Externí odkaz:
http://arxiv.org/abs/2409.09486
An accurate implementation of wetting and pressure drop is crucial to correctly reproducing fluid displacement processes in porous media. Although several strategies have been proposed in the literature, a systematic comparison of them is needed to d
Externí odkaz:
http://arxiv.org/abs/2407.10914
Autor:
Vélez-Ceron, Ignasi, Coelho, Rodrigo C. V., Guillamat, Pau, da Gama, Margarida Telo, Sagués, Francesc, Ignés-Mullol, Jordi
Microfluidics involves the manipulation of flows at the microscale, typically requiring external power sources to generate pressure gradients. Alternatively, harnessing flows from active fluids, which are usually chaotic, has been proposed as a parad
Externí odkaz:
http://arxiv.org/abs/2407.09960
Autor:
Coelho, Rodrigo C. V., Zhao, Hanqing, Amaral, Guilherme N. C., Smalyukh, Ivan I., da Gama, Margarida M. Telo, Tasinkevych, Mykola
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 manifestations of topology in the context of condensed matter is the to
Externí odkaz:
http://arxiv.org/abs/2405.10850
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-isotropic interface undergoes an orientational-wetting transition. If the ne
Externí odkaz:
http://arxiv.org/abs/2403.10178
Autor:
Silva, Danilo P. F., Coelho, Rodrigo C. V., Pagonabarraga, Ignacio, Succi, Sauro, da Gama, Margarida M. Telo, Araújo, Nuno A. M.
Publikováno v:
Soft Matter,20, 2419-2441(2024)
With the rapid development of studies involving droplet microfluidics, drug delivery, cell detection, and microparticle synthesis, among others, many scientists have invested significant efforts to model the flow of these fluid-filled bodies. Motivat
Externí odkaz:
http://arxiv.org/abs/2312.07369
Autor:
Matias, André F. V., Valente-Matias, Daniel F., Neng, Nuno R., Nogueira, José M. F., Andrade Jr., José S., Coelho, Rodrigo C. V., Araújo, Nuno A. M.
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 filtration, and coffee extraction. We propose a continuum equation to
Externí odkaz:
http://arxiv.org/abs/2304.03161
Autor:
Coelho, Rodrigo C. V., Zhao, Hanqing, Tasinkevych, Mykola, Smalyukh, Ivan I., da Gama, Margarida M. Telo
Publikováno v:
Phys. Rev. Research 5, 033210 (2023)
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 velocities. The simulations are based on the Landau-de Gennes $Q$ tenso
Externí odkaz:
http://arxiv.org/abs/2303.12045
Publikováno v:
Phys. Rev. Research 5, 033165 (2023)
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 the activity and droplet size on surfaces characterized by strong anc
Externí odkaz:
http://arxiv.org/abs/2302.10039