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Relationship Between Temperature Distribution and 2D Image of Condensation Jets Using Discrete Wavelets Multiresolution

[+] Author Affiliations
Motoaki Kimura, Masahiro Takei, Atushi Saima

Nihon University, Tokyo, Japan

Karen Vierow

Purdue University, West Lafayette, IN

Yoshifuru Saito

Hosei University, Tokyo, Japan

Kiyoshi Horii

Shirayuri College, Tokyo, Japan

Paper No. FEDSM2002-31114, pp. 1553-1562; 10 pages
doi:10.1115/FEDSM2002-31114
From:
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 1: Fora, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3615-0 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME

abstract

This paper describes the application of discrete wavelet transforms to the analysis of condensation jets in order to clarify the associated fluid and heat transfer phenomena. An experimentally obtained, two-dimensional image of the condensation particle density around the jet was decomposed into 7 levels of resolution with their respective wavelengths. Based on the known physical characteristics of turbulent flow around the jet, levels 0 and 1 were shown to represent the steady components of the condensation particle density and the higher levels represent the fluctuating components. From the analysis images, the width of the condensation zone was obtained and this compared well with the width inferred from temperature measurements. Thus, the method was verified and also provided data not available experimentally.

Copyright © 2002 by ASME

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