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TECHNICAL BRIEFS

Separation of Condensation Jet Image Using Filter Effect of Wavelets Transform

[+] Author and Article Information
Motoaki Kimura

Department of Mechanical Engineering, College of Science and Technology,  Nihon University, 1-8-14 Kanda Surugadai, Chiyoda-ku, Tokyo, 101-8308, Japankimura@mech.cst.nihon-u.ac.jp

Masahiro Takei, Atsushi Saima

Department of Mechanical Engineering, College of Science and Technology,  Nihon University, 1-8-14 Kanda Surugadai, Chiyoda-ku, Tokyo, 101-8308, Japan

Yoshifuru Saito

Department of Electronic Engineering, College of Technology,  Hosei University, Tokyo, Japan

J. Fluids Eng 127(5), 1047-1050 (May 12, 2005) (4 pages) doi:10.1115/1.1989373 History: Received December 24, 2003; Revised May 12, 2005

The present paper describes the application of discrete wavelet transform to the analysis of condensation jets in order to clarify the fluid and heat transfer phenomenon. The condensation jets in the nozzle vicinity are experimentally visualized via the laser light sheet method to obtain condensation particle density images of the jets. The image of the condensation particle density in the jet is decomposed to mean and fluctuation images via wavelet multiresolution. The dominant temperature boundary and the mean component outside the boundary were obtained from wavelet separation images. The boundary was compared to the experimentally obtained temperature distribution.

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Copyright © 2005 by American Society of Mechanical Engineers
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Figures

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Figure 1

Original image of condensation jets

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Figure 2

Mean temperature distribution

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Figure 3

Model of submerged condensation jet

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Figure 4

Large-scale images and small-scale images decomposed from condensation original images

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Figure 5

Normalized mean brightness distribution

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Figure 6

Normalized fluctuation brightness distribution

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Figure 7

Mean temperature distribution in the radial direction

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