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Physics of Fluids / Volume 14 / Issue 10 / ARTICLES

Phys. Fluids 14, 3570 (2002); doi:10.1063/1.1504447 (7 pages)

Experimental study of gravity-driven dense suspension jets

Maxime Nicolas

IUSTI, Technopôle de Château-Gombert, 5 rue Fermi, 13453 Marseille cedex 13, France

(Received 12 April 2001; accepted 12 July 2002; published online 5 September 2002)

This article presents experimental results from a study of a jet of dense suspension falling under gravity in a quiescent liquid bath of miscible liquid. The initial jet velocity v0 scales with the square of the initial jet diameter. Four different flow behaviors are observed. The jet remains cylindrical and stable when viscous forces are dominant. A capillary-like instability with formation of blobs occurs when a Reynolds number based on the particle diameter and a free-falling velocity is over unity. The blobs are stable and settle without changing shape only for a blob Reynolds number below a critical number. Dispersion of the jet particles is observed when the particle Reynolds number is over 1, and an atomization behavior occurs when particle inertia is large compared to viscous forces, i.e., when the Stokes number of the particles is large compared to unity. © 2002 American Institute of Physics.

© 2002 American Institute of Physics

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KEYWORDS and PACS

Keywords

jets, suspensions, two-phase flow, flow instability

PACS

ARTICLE DATA

Permalink
http://link.aip.org/link/doi/10.1063/1.1504447

PUBLICATION DATA

ISSN:

1070-6631 (print)  
1089-7666 (online)

Publisher:

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    R. D. Reitz and F. V. Bracco, "Mechanism of atomization of a liquid jet," Phys. Fluids 25, 1730 (1982)PFLDAS000025000010001730000001.

    S. P. Lin and D. J. Kang, "Atomization of a liquid jet," Phys. Fluids 30, 2000 (1987)PFLDAS000030000007002000000001.

    B. M. Cetegen, "Behavior of naturally unstable and periodically forced axisymmetric buoyant plumes of helium and helium-air mixtures," Phys. Fluids 9, 3742 (1997)PHFLE6000009000012003742000001.


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