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RESEARCH PAPERS: Boiling and Condensation

Heat Transfer Characteristics in Partial Boiling, Fully Developed Boiling, and Significant Void Flow Regions of Subcooled Flow Boiling

[+] Author and Article Information
S. G. Kandlikar

Mechanical Engineering Department, Rochester Institute of Technology, Rochester, NY 14623

J. Heat Transfer 120(2), 395-401 (May 01, 1998) (7 pages) doi:10.1115/1.2824263 History: Received July 18, 1997; Revised February 02, 1998; Online December 05, 2007

Abstract

Subcooled flow boiling covers the region beginning from the location where the wall temperature exceeds the local liquid saturation temperature to the location where the thermodynamic quality reaches zero, corresponding to the saturated liquid state. Three locations in the subcooled flow have been identified by earlier investigators as the onset of nucleate boiling, the point of net vapor generation, and the location where x = 0 is attained from enthalpy balance equations. The heat transfer regions are identified as the single-phase heat transfer prior to ONB, partial boiling (PB), and fully developed boiling (FDB). A new region is identified here as the significant void flow (SVF) region. Available models for predicting the heat transfer coefficient in different regions are evaluated and new models are developed based on our current understanding. The results are compared with some of the experimental data available in the literature.

Copyright © 1998 by The American Society of Mechanical Engineers
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