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International Heat Transfer Conference 10

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

POOL BOILING ON THIN HEATERS: THE ROLE OF THERMAL INTERACTION AMONG VAPOR STEMS

Pratap Sadasivan
Los Alamos National Laboratory Nuclear Engineering and Technology Division Engineering and Safety Analysis Group Los Alamos, NM 87545

Cetin Unal
Los Alamos National Laboratory Nuclear Engineering and Technology Division Engineering and Safety Analysis Group Los Alamos, NM 87545

Ralph A. Nelson
Applied Physics Division, Los Alamos National Laboratory, P.O. Box 1663, MS F661, Los Alamos, New Mexico 87545, USA

DOI: 10.1615/IHTC10.4700
pages 135-140

摘要

We examine the issue of thermal interactions within a heater as a possible explanation for conflicting critical heat flux data on thin heaters, as reported by various investigators. While heater thermal properties have been considered in previous studies, the focus of this study is the interaction between the thermal transport process within the heater and the distribution of nucleation sites on the heater surface. It is shown that the spatial distribution of stems on the heater surface, as well as the size distribution of these stems, can affect the average surface temperatures. Such interactions are greater as the heater thickness decreases.

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