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Record Details

Record 43 of 13201
Gravitational Instability in Suspension Flows
Offline Availability: Go to Request Form
Author and Affiliation:
Carpen, Ileana C.(California Inst. of Tech., Div. of Chemistry and Chemical Engineering, Pasadena, CA United States)
Brady, John F.(California Inst. of Tech., Div. of Chemistry and Chemical Engineering, Pasadena, CA United States)
Abstract: The gravity-driven flow of non-neutrally buoyant suspensions is shown to be unstable to spanwise perturbations when the shearing motion generates a density profile that increases with height. The instability is simply due to having heavier material over light. The wavelength of the perturbation is found to be on the order of the thickness of the suspension layer. The parameters important to the problem are the angle of inclination of the layer relative to gravity, the relative density difference between the particles and fluid, the ratio of the particle size to the suspension layer, and the bulk volume fraction of particles. An example showing the growth rate as a function of wave number is shown.
Publication Date: Nov 01, 2002
Document ID:
20030003643
(Acquired Jan 17, 2003)
Subject Category: FLUID MECHANICS AND THERMODYNAMICS
Document Type: Conference Paper
Publication Information: Sixth Microgravity Fluid Physics and Transport Phenomena Conference; Volume 1; 386-394; (NASA/CP-2002-211212/VOL1); (SEE 20030003624)
Financial Sponsor: NASA; Washington, DC United States
Organization Source: California Inst. of Tech.; Div. of Chemistry and Chemical Engineering; Pasadena, CA United States
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: GRAVITATIONAL INSTABILITY; SUSPENSIONS; SHEARING; PERTURBATION; PARTICLES; CONCENTRATION (COMPOSITION); GRAVITATION
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