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Measurement of water falling film thickness to flat plate using confocal chromatic sensoring technique

Zhou, D. W. and Gambaryan-Roisman, Tatiana and Stephan, Peter (2009):
Measurement of water falling film thickness to flat plate using confocal chromatic sensoring technique.
In: Experimental Thermal and Fluid Science, pp. 273-283, 33, (2), ISSN 08941777, [Online-Edition: http://dx.doi.org/10.1016/j.expthermflusci.2008.09.003],
[Article]

Abstract

An experimental investigation of wavy water film falling down a flat plate has been carried out using confocal chromatic sensoring technique to determine the instantaneous and statistical characteristics of the film. The experiments involved three parameters: liquid feed mode, Reynolds number and plate inclination angle. The present time--average film thickness data is compared with the previous experimental and theoretical results showing a good agreement. A new correlation for the average film thickness is suggested. Our results show that the liquid feed mode has a vital influence on the film thickness and that the film thickness increases with Reynolds number and decreased plate inclination angle. The root--mean--square value of the film thickness fluctuations depends non-monotonically on the film Reynolds number. The corresponding mechanisms are analyzed.

Item Type: Article
Erschienen: 2009
Creators: Zhou, D. W. and Gambaryan-Roisman, Tatiana and Stephan, Peter
Title: Measurement of water falling film thickness to flat plate using confocal chromatic sensoring technique
Language: German
Abstract:

An experimental investigation of wavy water film falling down a flat plate has been carried out using confocal chromatic sensoring technique to determine the instantaneous and statistical characteristics of the film. The experiments involved three parameters: liquid feed mode, Reynolds number and plate inclination angle. The present time--average film thickness data is compared with the previous experimental and theoretical results showing a good agreement. A new correlation for the average film thickness is suggested. Our results show that the liquid feed mode has a vital influence on the film thickness and that the film thickness increases with Reynolds number and decreased plate inclination angle. The root--mean--square value of the film thickness fluctuations depends non-monotonically on the film Reynolds number. The corresponding mechanisms are analyzed.

Journal or Publication Title: Experimental Thermal and Fluid Science
Volume: 33
Number: 2
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 14:36
Official URL: http://dx.doi.org/10.1016/j.expthermflusci.2008.09.003
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