Brownian diffusion of wetted particle at fluctuating interface

ORAL

Abstract

We study the effects of thermally induced capillary waves on the diffusivity of a wetted particle at a fluctuating interface. Recent studies have shown that the wetted particle feels an unexpected viscous drag at the fluctuating interface which is larger than the one in the bulk. Our numerical investigations can address the problem by using a fluctuating multicomponent lattice Boltzmann (LB) model for non-ideal multicomponent fluids, including non-equilibrium stochastic fluxes mimicking the effects of molecular forces at the nanoscales coupled with wetted finite-size particle. We will present results on the Brownian diffusion for the wetted colloids both in bulk and at the fluctuating interface. Beyond the practical importance of our findings for kinetically driven assembly of particles, our study also explores a novel application of LB with colloid-fluid interactions in the realm of nanofluidic phenomena.

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Presenters

  • Xiao Xue

    Eindhoven University of Technology, University of Rome Tor Vergata

Authors

  • Xiao Xue

    Eindhoven University of Technology, University of Rome Tor Vergata

  • Mauro Sbragaglia

    University of Rome Tor Vergata, University of Rome Tor Vergata, University of Rome Tor Vergata, University of Rome Tor Vergata, Department of Physics & INFN

  • Luca Biferale

    University of Rome Tor Vergata, University Tor Vergata, University of Rome Tor Vergata, Department of Physics & INFN, University of Rome Tor Vergata and INFN

  • Federico Toschi

    Eindhoven University of Technology, Eindhoven Univ of Tech, Eindhoven University of Technology, CNR, CNR