Volume 89, Number 4, February 2010
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||08 March 2010|
Nanoflows through disordered media: A joint lattice Boltzmann and molecular dynamics investigation
Dipartimento di Fisica and CNR-INFM-SOFT, Università di Roma La Sapienza - Piazzale A. Moro 2, 00185 Roma, Italy, EU
2 Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR) 51170 Köln, Germany, EU
3 Istituto Applicazioni Calcolo, CNR - via dei Taurini 19, 00185 Roma, Italy, EU
4 Freiburg Institute for Advanced Studies, Albert Ludwig University - Albertstrasse 19, 79104 Freiburg, Germany, EU
Corresponding author: firstname.lastname@example.org
Accepted: 8 February 2010
We investigate nanoflows through dilute disordered media by means of joint lattice Boltzmann (LB) and molecular dynamics (MD) simulations —when the size of the obstacles is comparable to the size of the flowing particles— for randomly located spheres and for a correlated particle-gel. In both cases at sufficiently low solid fraction, Φ < 0.01, LB and MD provide similar values of the permeability. However, for Φ > 0.01, MD shows that molecular-size effects lead to a decrease of the permeability, as compared to the Navier-Stokes predictions. For gels, the simulations highlights a surplus of permeability, which can be accommodated within a rescaling of the effective radius of the gel monomers.
PACS: 47.56.+r – Flows through porous media / 47.11.-j – Computational methods in fluid dynamics / 47.61.-k – Micro- and nano- scale flow phenomena
© EPLA, 2010
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