Bubble Dynamics in Boiling Under High Heat Flux Pulse Heating

[+] Author and Article Information
A. Asai

Canon Inc. Research Center, 5-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-01, Japan

J. Heat Transfer 113(4), 973-979 (Nov 01, 1991) (7 pages) doi:10.1115/1.2911230 History: Received August 13, 1990; Revised May 23, 1991; Online May 23, 2008


A new theoretical model of bubble behavior in boiling under high heat flux pulse is presented. The essence of the model is nucleation in the superheated liquid followed by instantaneous formation of a vapor film, rapid bubble growth due to the pressure impulse, and cavitation bubble collapse. To check the model, boiling of methanol under 5 ~ 50 MW m−2 heat flux pulse using a small thin film heater has been experimentally investigated. When the heat flux was relatively low (< 20 MW m−2 ), a bubble grew in a hemispherical shape. When the heat flux was extremely high (> 20 MW m−2 ), many small bubbles nucleated and combined into a vapor film. The bubble behavior in the latter case is explained well by the model.

Copyright © 1991 by The American Society of Mechanical Engineers
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