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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.5b00428
|2 doi
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| 028 |
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|a eng
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|a Kundan, Akshay
|e verfasserin
|4 aut
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|a Effect of capillary and marangoni forces on transport phenomena in microgravity
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|c 2015
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 16.07.2015
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|a Date Revised 19.05.2015
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The Constrained Vapor Bubble (CVB) experiment concerns a transparent, simple, "wickless" heat pipe operated in the microgravity environment of the International Space Station (ISS). In a microgravity environment, the relative effect of Marangoni flow is amplified because of highly reduced buoyancy driven flows as demonstrated herein. In this work, experimental results obtained using a transparent 30 mm long CVB module, 3 mm × 3 mm in square cross-section, with power inputs of up to 3.125 W are presented and discussed. Due to the extremely low Bond number and the dielectric materials of construction, the CVB system was ideally suited to determining if dry-out as a result of Marangoni forces might contribute to limiting heat pipe performance and exactly how that limitation occurs. Using a combination of visual observations and thermal measurements, we find a more complicated phenomenon in which opposing Marangoni and capillary forces lead to flooding of the device. A simple one-dimensional, thermal-fluid flow model describes the essence of the relative importance of the two stresses. Moreover, even though the heater end of the device is flooded and the liquid is highly superheated, boiling does not occur due to high evaporation rates
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|a Journal Article
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|a Plawsky, Joel L
|e verfasserin
|4 aut
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|a Wayner, Peter C
|c Jr
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 31(2015), 19 vom: 19. Mai, Seite 5377-86
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|x 1520-5827
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|g volume:31
|g year:2015
|g number:19
|g day:19
|g month:05
|g pages:5377-86
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|u http://dx.doi.org/10.1021/acs.langmuir.5b00428
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