The Raspberry model for hydrodynamic interactions revisited. II. The effect of confinement

The Journal of Chemical Physics
Joost de GraafC Holm

Abstract

The so-called "raspberry" model refers to the hybrid lattice-Boltzmann (LB) and Langevin molecular dynamics schemes for simulating the dynamics of suspensions of colloidal particles, originally developed by Lobaskin and Dünweg [New J. Phys. 6, 54 (2004)], wherein discrete surface points are used to achieve fluid-particle coupling. In this paper, we present a follow up to our study of the effectiveness of the raspberry model in reproducing hydrodynamic interactions in the Stokes regime for spheres arranged in a simple-cubic crystal [Fischer et al., J. Chem. Phys. 143, 084107 (2015)]. Here, we consider the accuracy with which the raspberry model is able to reproduce such interactions for particles confined between two parallel plates. To this end, we compare our LB simulation results to established theoretical expressions and finite-element calculations. We show that there is a discrepancy between the translational and rotational mobilities when only surface coupling points are used, as also found in Part I of our joint publication. We demonstrate that adding internal coupling points to the raspberry can be used to correct said discrepancy in confining geometries as well. Finally, we show that the raspberry model accurately repro...Continue Reading

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Citations

Apr 10, 2016·The Journal of Chemical Physics·Joost de GraafTyler N Shendruk
Sep 4, 2015·The Journal of Chemical Physics·Lukas P FischerJoost de Graaf
Aug 1, 2016·The Journal of Chemical Physics·Georg RempferJoost de Graaf
Oct 27, 2016·The Journal of Chemical Physics·Sven Erik IlseJoost de Graaf
May 13, 2017·Soft Matter·Tobias RauChristian Holm
Jan 5, 2017·The Journal of Chemical Physics·Taras Y MolotilinOlga I Vinogradova
Mar 17, 2017·Physical Review. E·Joost de Graaf, Joakim Stenhammar
Sep 25, 2017·Soft Matter·Alexander L DubovOlga I Vinogradova
May 10, 2019·The Journal of Chemical Physics·Miru LeeChristian Holm
May 3, 2018·Soft Matter·Fabian Jan Schwarzendahl, Marco G Mazza
Aug 12, 2017·The Journal of Chemical Physics·Michael KuronJoost de Graaf
Oct 27, 2018·Computational and Mathematical Methods in Medicine·Martin BušíkIvan Cimrák
Jun 30, 2019·The European Physical Journal. E, Soft Matter·Livio Nicola CarenzaAdriano Tiribocchi
Dec 19, 2020·Physical Review Letters·Stefania KetzetziDaniela J Kraft
Oct 15, 2021·Physical Chemistry Chemical Physics : PCCP·Martin Kaiser, Sofia S Kantorovich

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