| Acoustic field interaction with a boiling system under terrestrial gravity and microgravity. | |
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MedLine Citation:
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PMID: 9821335 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Pool boiling experiments from a platinum wire heater in FC-72 liquid were conducted under terrestrial and microgravity conditions, both with and without the presence of a high-intensity acoustic standing wave within the fluid. The purpose of this research was to study the interaction between an acoustic field and a pool boiling system in normal gravity and microgravity. The absence of buoyancy in microgravity complicates the process of boiling. The acoustic force on a vapor bubble generated from a heated wire in a standing wave was shown to be able to play the role of buoyancy in microgravity. The microgravity environment was achieved with 0.6 and 2.1-s drop towers. The sound was transmitted through the fluid medium by means of a half wavelength sonic transducer driven at 10.18 kHz. At high enough acoustic pressure amplitudes cavitation and streaming began playing an important role in vapor bubble dynamics and heat transfer. Several different fixed heat fluxes were chosen for the microgravity experiment and the effects of acoustics on the surface temperature of the heater were recorded and the vapor bubble movement was filmed. Video images of the pool boiling processes and heat transfer data are presented. |
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Authors:
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J S Sitter; T J Snyder; J N Chung; P L Marston |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 104 ISSN: 0001-4966 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 1998 Nov |
Date Detail:
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Created Date: 1998-12-14 Completed Date: 1998-12-14 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 2561-9 Citation Subset: IM; S |
Affiliation:
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School of Mechanical and Materials Engineering, Washington State University, Pullman 99164-2920, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustics* Earth (Planet)* Gravitation* Hot Temperature* Models, Theoretical Platinum Weightlessness* |
| Chemical | |
Reg. No./Substance:
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7440-06-4/Platinum |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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