TY  - JOUR
AU  - Jung, David
AU  - Uttinger, Maximilian Johannes
AU  - Malgaretti, Paolo
AU  - Peukert, Wolfgang
AU  - Walter, Johannes
AU  - Harting, Jens
TI  - Hydrodynamic simulations of sedimenting dilute particle suspensions under repulsive DLVO interactions
JO  - Soft matter
VL  - 18
IS  - 11
SN  - 1744-683X
CY  - London
PB  - Royal Soc. of Chemistry
M1  - FZJ-2022-05302
SP  - 2157 - 2167
PY  - 2022
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - 35212700
UR  - <Go to ISI:>//WOS:000761274400001
DO  - DOI:10.1039/D1SM01294K
UR  - https://juser.fz-juelich.de/record/912075
ER  -