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Condensation of Forced Convection Two-Phase Flow in a Miniature TubeA physical/mathematical model of annular film condensation at the inlet of a miniature tube has been developed. In the model, the liquid flow is coupled with the vapor flow along the liquid-vapor interface through the interfacial temperature, heat flux, shear stress, and pressure jump conditions due to surface tension effects. The model predicts the shape of the liquid-vapor interface along the condenser and leads to the conclusion that there is complete condensation at a certain distance from the condenser inlet. The numerical results show that complete condensation of the incoming vapor is possible at comparatively low heat loads and that this is a special case of a more general condensation regime with two-phase bubbly flow downstream of the initial annular film condensation region. Observations from the flow visualization experiment confirm the existence and qualitative features of annular film condensation leading to the complete condensation phenomenon in a small diameter (3.25 mm) circular tube condenser.
Document ID
20010004362
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Begg, E. (Connecticut Univ. Storrs, CT United States)
Faghri, A. (Connecticut Univ. Storrs, CT United States)
Krustalev, D. (Thermacore, Inc. Lancaster, PA United States)
Date Acquired
August 20, 2013
Publication Date
March 1, 1999
Publication Information
Publication: Proceedings of the Fourth Microgravity Fluid Physics and Transport Phenomena Conference
Subject Category
Fluid Mechanics And Thermodynamics
Funding Number(s)
CONTRACT_GRANT: NAG3-1870
CONTRACT_GRANT: NSF CTS-94-1458
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle20010004264Collected WorksProceedings of the Fourth Microgravity Fluid Physics and Transport Phenomena Conference
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