Boiling of highly wetting liquids in oscillatory flow
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Authors
Turk, Ugur
Subjects
Advisors
Kelleher, Matthew
Date of Issue
1995-12
Date
December 1995
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
In the present study, boiling of highly wetting dielectric fluid has been investigated in an oscillating Fluid environment. A piston is designed to create oscillations in the fluid and over a heated platinum wire. Because of their low surface tension, these liquids require very high superheat to initiate nucleate boiling. It is expected that the amount of necessary temperature overshoot for the onset of nucleate boiling, can be decreased with oscillation in the fluid. The oscillation can remove the bubbles, which are forming in the nucleation sites as soon as they start growing on the outer surface. This increases efficiency of nucleation sites, which are very scarce. All of the oscillation amplitudes and frequencies, tested here, changed the boiling curve of highly wetting dielectric fluid, so that the apparent temperature overshoot has decreased. Remarkably at some oscillation amplitude and frequencies the superheat is almost vanished. The effects of the amplitudes and frequencies on the boiling curve varied because of the present bubble size and growth rate, which depend on the size and shape of the nucleation sites. (AN)
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
78 p.
Citation
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.