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Experimental study of bubble behavior and local heat flux in pool boiling under variable gravitational conditions

Stephan, Peter and Schweizer, N. (2009):
Experimental study of bubble behavior and local heat flux in pool boiling under variable gravitational conditions.
In: Multiphase Science and Technology, pp. 329-350, 21, (4), ISSN 0276-1459, [Online-Edition: http://dx.doi.org/10.1615/MultScienTechn.v21.i4.40],
[Article]

Abstract

This paper presents the results of a nucleate boiling experiment performed in the framework of the 42nd European Space Agency parabolic flight campaign. Nucleate boiling of FC-72 was established at a single artificial cavity on a thin stainless steel heating foil. The bubble shape and the temperature distribution of the heating foil were measured via high-speed imaging and infrared thermography at different gravity levels and during transition phases between these levels. The influence of gravity on bubble frequency and departure diameter was evaluated. The transient heat flux distribution was calculated by applying an energy balance at each pixel of the infrared temperature image. This heat flux distribution is presented for a complete bubble cycle (growing, detachment and rise), bubble coalescence, and satellite bubble merger.

Item Type: Article
Erschienen: 2009
Creators: Stephan, Peter and Schweizer, N.
Title: Experimental study of bubble behavior and local heat flux in pool boiling under variable gravitational conditions
Language: German
Abstract:

This paper presents the results of a nucleate boiling experiment performed in the framework of the 42nd European Space Agency parabolic flight campaign. Nucleate boiling of FC-72 was established at a single artificial cavity on a thin stainless steel heating foil. The bubble shape and the temperature distribution of the heating foil were measured via high-speed imaging and infrared thermography at different gravity levels and during transition phases between these levels. The influence of gravity on bubble frequency and departure diameter was evaluated. The transient heat flux distribution was calculated by applying an energy balance at each pixel of the infrared temperature image. This heat flux distribution is presented for a complete bubble cycle (growing, detachment and rise), bubble coalescence, and satellite bubble merger.

Journal or Publication Title: Multiphase Science and Technology
Volume: 21
Number: 4
Divisions: 16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Exzellenzinitiative > Clusters of Excellence > Center of Smart Interfaces (CSI)
16 Department of Mechanical Engineering
Zentrale Einrichtungen
Exzellenzinitiative
Exzellenzinitiative > Clusters of Excellence
Date Deposited: 17 Mar 2015 15:05
Official URL: http://dx.doi.org/10.1615/MultScienTechn.v21.i4.40
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