Modeling of particles dispersion on liquid surfaces

Document Type

Conference Proceeding

Publication Date

12-1-2010

Abstract

When small particles (e.g., flour, pollen, etc.) come in contact with a liquid surface, they immediately disperse. The dispersion can occur so quickly that it appears explosive, especially for small particles on the surface of mobile liquids like water. This explosive-like dispersion is the consequence of capillary forces pulling particles into the interface causing them to accelerate to a relatively large velocity. The maximum velocity increases with decreasing particle size; for nanometer-sized particles (e.g., viruses and proteins), the velocity on an air-water interface can be as large as 47 m/s. We also show that particles oscillate at a relatively-high frequency about their floating equilibrium before coming to stop under viscous drag. The observed dispersion is a result of strong repulsive hydrodynamic forces that arise because of these oscillations. Copyright © 2010 by ASME.

Identifier

80054982516 (Scopus)

ISBN

[9780791849484]

Publication Title

American Society of Mechanical Engineers Fluids Engineering Division Publication Fedsm

External Full Text Location

https://doi.org/10.1115/FEDSM-ICNMM2010-30555

ISSN

08888116

First Page

1429

Last Page

1432

Issue

PARTS A, B AND C

Volume

1

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