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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.5

ISSN Imprimir: 1065-3090
ISSN On-line: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v9.i4.10
10 pages

IMAGE CORRELATION OF PARTICLE DISTRIBUTION BY DISCRETE WAVELET TRANSFORM OF CAPACITANCE CT IMAGES

Masahiro Takei
Department of Mechanical Engineering, College of Science and Technology, Nihon University, 1-8, Kanda Surugadai, Chiyodaku, Tokyo 101-8308, Japan
Mitsuaki Ochi
Department of Mechanical Engineering, Nihon University, 8-14 Kanda Surugadai, Tokyo 101-8308, Japan
Hui Li
Department of Mechanical Engineering, Kagoshima University, Korimoto, Kagoshima, Japan
Yoshifuru Saito
Department of Electrical and Electronic Engineering, College of Technology, Hosei University, Tokyo, Japan
Kiyoshi Horii
Shirayuri College, 1-25 Midorigaoka, Chofu-shi, Tokyo 182-8525, JAPAN

RESUMO

Particle distributions in a cross section of a solid-air two-phase flow through a pipe are visualized by capacitance CT at a frame rate of 100 fps. The CT images are decomposed by tire discrete wavelet transform, and the image correlation between the time-series image and a standard choking image. The correlation coefficient on wavelet 0 at a choking state is close to 1.0. The level-0 wavelet transformation resolves the largest particle distribution features. This technique is expected to be useful as a basis for automatically judging blockage emergencies in airborne particle transport through pipelines.


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