A New Method of Heat Transfer Coefficient Measurements by Liquid Crystal and Digital Processing

In the last ten years liquid crystals have emerged as reliable temperature sensors for heat transfer research, and have been applied in a number of situations to visualize temperature distribution under complex flow fields. In this study, the true-colour image processing of the liquid crystal has be...

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Bibliographic Details
Published in:Chemical engineering research & design 1997-10, Vol.75 (7), p.657-662
Main Authors: Stasiek, J., Mikielewicz, D., Mikielewicz, J., Collins, M.W.
Format: Article
Language:English
Subjects:
Computers in experimental physics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
heat transfer
Image forming and processing
Image processing
Imaging and optical processing
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
liquid crystal
Optics
Physics
true-colour image processing
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Summary:In the last ten years liquid crystals have emerged as reliable temperature sensors for heat transfer research, and have been applied in a number of situations to visualize temperature distribution under complex flow fields. In this study, the true-colour image processing of the liquid crystal has been successfully applied to the study of heat transfer problems. A new procedure has been developed (this involves a colour scale representation of the local contours of local Nusselt number) to obtain an average Nusselt number using the Hue ratio coefficient (ratio of the number of pixels for the hue range considered to the total number of pixels of a certain area).
ISSN:0263-8762
DOI:10.1205/026387697524281