%0 Journal Article
%A Jung, David
%A Uttinger, Maximilian Johannes
%A Malgaretti, Paolo
%A Peukert, Wolfgang
%A Walter, Johannes
%A Harting, Jens
%T Hydrodynamic simulations of sedimenting dilute particle suspensions under repulsive DLVO interactions
%J Soft matter
%V 18
%N 11
%@ 1744-683X
%C London
%I Royal Soc. of Chemistry
%M FZJ-2022-05302
%P 2157 - 2167
%D 2022
%X We present guidelines to estimate the effect of electrostatic repulsion in sedimenting dilute particle suspensions. Our results are based on combined Langevin dynamics and lattice Boltzmann simulations for a range of particle radii, Debye lengths and particle concentrations. They show a simple relationship between the slope K of the sedimentation velocity over the concentration versus the range χ of the electrostatic repulsion normalized by the average particle-particle distance. When χ→0, the particles are too far away from each other to interact electrostatically and K=6.55 as predicted by the theory of Batchelor. As χ increases, K likewise increases up to a maximum around χ=0.5 and then decreases again to a concentration-dependent constant over the range χ=0.5−1, while the particles transition from a disordered gas-like distribution to a liquid-like state with a narrow distribution of the interparticle spacing.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ 35212700
%U <Go to ISI:>//WOS:000761274400001
%R 10.1039/D1SM01294K
%U https://juser.fz-juelich.de/record/912075