Display options
Cite
de Graaf J, Peter T, Fischer LP, et al. The Raspberry model for hydrodynamic interactions revisited. II. The effect of confinement. J Chem Phys. 2015;143(8):084108doi: 10.1063/1.4928503.
de Graaf, J., Peter, T., Fischer, L. P., & Holm, C. (2015). The Raspberry model for hydrodynamic interactions revisited. II. The effect of confinement. The Journal of chemical physics, 143(8), 084108. https://doi.org/10.1063/1.4928503
de Graaf, Joost, et al. "The Raspberry model for hydrodynamic interactions revisited. II. The effect of confinement." The Journal of chemical physics vol. 143,8 (2015): 084108. doi: https://doi.org/10.1063/1.4928503
de Graaf J, Peter T, Fischer LP, Holm C. The Raspberry model for hydrodynamic interactions revisited. II. The effect of confinement. J Chem Phys. 2015 Aug 28;143(8):084108. doi: 10.1063/1.4928503. PMID: 26328819.
Copy Download .nbib Format: NLM
Share it on

J Chem Phys. 2015 Aug 28;143(8):084108. doi: 10.1063/1.4928503.

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

The Journal of chemical physics

Joost de Graaf, Toni Peter, Lukas P Fischer, Christian Holm

Affiliations

  1. Institute for Computational Physics (ICP), University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany.

PMID: 26328819 DOI: 10.1063/1.4928503

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 reproduces hydrodynamic interactions between a spherical colloid and planar walls up to roughly one LB lattice spacing.

Publication Types