Nanoflows through disordered media: a joint Lattice Boltzmann and Molecular Dynamics investigation

Abstract

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, $\Phi <0.01$, LB and MD provide similar values of the permeability. However, for $\Phi >0.01$, 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.

4 pages, 4 figures

References in corpus (4)

• Phase diagram of patchy colloids: towards empty liquids
• De-coupling of Exchange and Persistence Times in Atomistic Models of Glass Formers
• Lattice Boltzmann versus Molecular Dynamics simulation of nano-hydrodynamic flows
• The wall shear rate distribution for flow in random sphere packings

Cited by in corpus (1)

• Active Brownian Particles in Random and Porous Environments