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Drops in Space: Super Oscillations and Surfactant StudiesAn unprecedented microgravity observation of maximal shape oscillations of a surfactant-bearing water drop the size of a ping pong ball was observed during a mission of Space Shuttle Columbia as part of the second United States Microgravity Laboratory-USML-2 (STS-73, October 20-November 5, 1995). The observation was precipitated by the action of an intense sound field which produced a deforming force on the drop. When this deforming force was suddenly reduced, the drop executed nearly free and axisymmetric oscillations for several cycles, demonstrating a remarkable amplitude of nonlinear motion. Whether arising from the discussion of modes of oscillation of the atomic nucleus, or the explosion of stars, or how rain forms, the complex processes influencing the motion, fission, and coalescence of drops have fascinated scientists for centuries. Therefore, the axisymmetric oscillations of a maximally deformed liquid drop are noteworthy, not only for their scientific value but also for their aesthetic character. Scientists from Yale University, the Jet Propulsion Laboratory (JPL) and Vanderbilt University conducted liquid drop experiments in microgravity using the acoustic positioning/manipulation environment of the Drop Physics Module (DPM). The Yale/JPL group's objectives were to study the rheological properties of liquid drop surfaces on which are adsorbed surfactant molecules, and to infer surface properties such as surface tension, Gibb's elasticity, and surface dilatational viscosity by using a theory which relies on spherical symmetry to solve the momentum and mass transport equations.
Document ID
19970000450
Document Type
Conference Paper
Authors
Apfel, Robert E. (Yale Univ. New Haven, CT United States)
Tian, Yuren (Yale Univ. New Haven, CT United States)
Jankovsky, Joseph (Yale Univ. New Haven, CT United States)
Shi, Tao (Emory Univ. Atlanta, GA United States)
Chen, X. (Yale Univ. New Haven, CT United States)
Holt, R. Glynn (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Trinh, Eugene (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Croonquist, Arvid (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Thornton, Kathyrn C. (NASA Johnson Space Center Houston, TX United States)
Sacco, Albert, Jr. (NASA Johnson Space Center Houston, TX United States)
Coleman, Catherine (NASA Johnson Space Center Houston, TX United States)
Leslie, Fred W. (NASA Johnson Space Center Houston, TX United States)
Matthiesen, David H. (NASA Johnson Space Center Houston, TX United States)
Date Acquired
August 17, 2013
Publication Date
September 1, 1996
Publication Information
Publication: Third Microgravity Fluid Physics Conference
Subject Category
Materials Processing
Funding Number(s)
CONTRACT_GRANT: JPL-958722
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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