Volume fraction instability in an oscillating non-Brownian iso-dense suspension - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2017

Volume fraction instability in an oscillating non-Brownian iso-dense suspension

Résumé

The instability of an iso-dense non-Brownian suspension of polystyrene beads of diameter 40 μm dispersed in a water-glycerol mixture submitted to a periodic square wave oscillating flow in a Hele-Shaw cell is studied experimentally. The instability gives rise to stationary bead concentration waves transverse to the flow. It has been observed for average particle volume fractions between 0.25 and 0.4, for periods of the square wave flow variation between 0.4 and 10 s and in finite intervals of the amplitude of the fluid displacement. The study shows that the wavelength λ increases roughly linearly with the amplitude of the oscillatory flow; on the other hand, λ is independent of the particle concentration and of the period of oscillation of the flow although the minimum threshold amplitude for observing the instability increases with the period.
Fichier principal
Vignette du fichier
epjconf162386_rayitas.pdf (833.25 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04447365 , version 1 (12-02-2024)

Licence

Copyright (Tous droits réservés)

Identifiants

Citer

Y.L. Roht, G. Gauthier, J.P. Hulin, D. Salin, R. Chertcoff, et al.. Volume fraction instability in an oscillating non-Brownian iso-dense suspension. Powders & Grains 2017 - 8 th International Conference on Micromechanics on Granular Media, Jul 2017, Montpellier, France. pp.09029, ⟨10.1051/epjconf/201714009029⟩. ⟨hal-04447365⟩
9 Consultations
4 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More