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Mesoscopic model for binary fluids |
C. Echeverria1, K. Tucci1,2, O. Alvarez-Llamoza3,4, E. E. Orozco-Guillén5, M. Morales6, M. G. Cosenza2( ) |
1. CeSiMo, Universidad de Los Andes, Mérida 5251, Mérida, Venezuela
2. Grupo de Caos y Sistemas Complejos, Centro de Física Fundamental, Universidad de Los Andes, Mérida, Venezuela
3. Departamento de Física, FACYT, Universidad de Carabobo, Valencia, Venezuela
4. Facultad de Ingeniería, Universidad Católica de Cuenca, Ecuador
5. Programa Académico de Ingeniería en Energía, Universidad Politécnica de Sinaloa, 82199 Mazatlán, Mexico
6. Programa Académico de Ingeniería en Nanotecnología, Universidad Politécnica de Sinaloa, 82199 Mazatlán, Mexico |
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Abstract We propose a model for studying binary fluids based on the mesoscopic molecular simulation technique known as multiparticle collision, where the space and state variables are continuous, and time is discrete. We include a repulsion rule to simulate segregation processes that does not require calculation of the interaction forces between particles, so binary fluids can be described on a mesoscopic scale. The model is conceptually simple and computationally efficient; it maintains Galilean invariance and conserves the mass and energy in the system at the micro- and macro-scale, whereas momentum is conserved globally. For a wide range of temperatures and densities, the model yields results in good agreement with the known properties of binary fluids, such as the density profile, interface width, phase separation, and phase growth. We also apply the model to the study of binary fluids in crowded environments with consistent results.
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| Keywords
multiparticle collision dynamics
mesoscopic models
phase separation
interface dynamics
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Corresponding Author(s):
M. G. Cosenza
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Issue Date: 09 June 2017
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