Publicación: Numerical simulations of Brownian suspensions using Smoothed Dissipative Particle Dynamics: Diffusion, rheology and microstructure
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2013
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info:eu-repo/semantics/openAccess
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Resumen
In this work, a Smoothed Dissipative Particle Dynamics (SDPD) model is presented to simulate dilute-to-concentrated colloidal suspensions with a Newtonian matrix. The Brownian solvent medium is simulated explicitly with the SDPD model and it mediates the long-range fluctuating hydrodynamic interaction between suspended particles. To account for the short-range lubrication interactions, interparticle correction terms are included. In particular, in the Brownian regime the GENERIC framework is used to introduce the stochastic contribution to the lubrication, complying the Fluctuation-Dissipation Theorem. The resulting stochastic equations are solved implicitly by using a splitting technique. The SDPD scheme allows to accurately and efficiently simulate dilute to highly concentrated Brownian suspensions of spheres. Diffusivity, rheology and microstructure of the Brownian particulate system are discussed and compared with previous simulations and experimental results. The effect of the stochastic lubrication model is also analyzed and discussed.
Descripción
This is the Accepted Manuscript of an article published by Elsevier in "Journal of Non-Newtonian Fluid Mechanics" on 2023, available online: https://doi.org/10.1016/j.jnnfm.2023.105044
Este es el manuscrito aceptado de un artículo publicado por Elsevier en "Journal of Non-Newtonian Fluid Mechanics" en 2023, disponible en línea: https://doi.org/10.1016/j.jnnfm.2023.105044
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Palabras clave
fluctuating hydrodynamics, Smoothed Dissipative Particle Dynamics, stochastic lubrication, brownian suspension rheology
Citación
Adolfo Vázquez-Quesada, Marco Ellero, Numerical simulations of Brownian suspensions using Smoothed Dissipative Particle Dynamics: Diffusion, rheology and microstructure, Journal of Non-Newtonian Fluid Mechanics, Volume 317, 2023, 105044, ISSN 0377-0257, https://doi.org/10.1016/j.jnnfm.2023.105044.
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Facultades y escuelas
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Física Fundamental