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Non-Isothermal Experimental Study of the Constrained Vapor Bubble ThermosyphonExperimental and theoretical techniques to study non-isothermal transport processes in the constrained vapor bubble thermosyphon (CVBT) were developed using a pentane/quartz system. The transport processes can be evaluated by measuring the liquid film profile, which gives the pressure field, and the temperature field. The axial variation in the capillary pressure was measured using an image-analyzing interferometer that is based on computer-enhanced video microscopy of the naturally occurring interference fringes. Thermoelectric coolers were used to control the temperature level in the condensation region and, therefore, the length of the approximately 'adiabatic' surface region which is a function of the temperature difference between the CVBT surface and the surroundings. High values for the axial thermal conductance in the 'adiabatic' surface region were demonstrated under certain conditions.
Document ID
19970000382
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Karthikeyan, Muthu
(Rensselaer Polytechnic Inst. Troy, NY United States)
Huang, Jianming
(Rensselaer Polytechnic Inst. Troy, NY United States)
Plawsky, Joel
(Rensselaer Polytechnic Inst. Troy, NY United States)
Wayner, Peter, Jr.
(Rensselaer Polytechnic Inst. Troy, NY United States)
Date Acquired
August 17, 2013
Publication Date
September 1, 1996
Publication Information
Publication: Third Microgravity Fluid Physics Conference
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
97N10349
Funding Number(s)
CONTRACT_GRANT: NAG3-1399
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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