Decay of velocity fluctuations in a stably stratified suspension

Document Type

Article

Publication Date

1-1-2000

Abstract

The evolution of velocity fluctuations in a stably stratified suspension settling under the influence of gravity is studied. Based on a continuum model for sedimentation dynamics, decay of long-wave fluctuations in the particle density is found. Substantial reduction in velocity fluctuations is an important consequence. Specifically, the evolution of the particle density in a stably stratified suspension immediately leads to particle distributions, where the variance in the velocity is bounded as the container size grows to infinity. This result is a possible explanation for why velocity fluctuations have been observed to depend on container size in numerical simulations but generally not in physical experiments. © 2000 American Institute of Physics.

Identifier

0034078038 (Scopus)

Publication Title

Physics of Fluids

External Full Text Location

https://doi.org/10.1063/1.870412

ISSN

10706631

First Page

1619

Last Page

1621

Issue

6

Volume

12

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