Journal Article

FZJ-2022-05302

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Hydrodynamic simulations of sedimenting dilute particle suspensions under repulsive DLVO interactions

Jung, D.FZJ* ; Uttinger, M. J. ; Malgaretti, P.FZJ* ; Peukert, W. ; Walter, J. ; Harting, J. (Corresponding author)FZJ*

2022
Royal Soc. of Chemistry London

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Please use a persistent id in citations: http://hdl.handle.net/2128/33607  doi:10.1039/D1SM01294K

Abstract: 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.

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Contributing Institute(s):

1. Helmholtz-Institut Erlangen-Nürnberg Erneuerbare Energien (IEK-11)

Research Program(s):

1. 1215 - Simulations, Theory, Optics, and Analytics (STOA) (POF4-121) (POF4-121)
2. DFG project 416229255 - SFB 1411: Produktgestaltung disperser Systeme (416229255)

Appears in the scientific report 2022

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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