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Evaluation of viewing-angle effect on determination of local heat transfer coefficients on a curved surface using transient and heated-coating liquid-crystal methods

Evaluation of viewing-angle effect on determination of local heat transfer coefficients on a... This paper presents the effect of viewing-angle variations on the accuracy of transient and heated-coating liquid-crystal methods for determining the local heat transfer coefficients on a curved surface. A developed liquid-crystal calibration technique using a true-color image processing system has been used to alleviate the effect of viewing angle on oblique/curved surfaces. The accuracy of heat transfer coefficients improved significantly with careful correction of the viewing-angle effect on the surface geometry. It is crucial to ensure the implementation of the suggested calibration technique to be used in wideband thermochromic liquid-crystal applications on the non-orthogonal surface. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Evaluation of viewing-angle effect on determination of local heat transfer coefficients on a curved surface using transient and heated-coating liquid-crystal methods

Chan, T. L.
Experiments in Fluids , Volume 31 (4) – Oct 1, 2001
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Publisher
Springer Journals
Copyright
Copyright © 2001 by Springer-Verlag Berlin Heidelberg
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
DOI
10.1007/s003480100334
Publisher site
See Article on Publisher Site

Abstract

This paper presents the effect of viewing-angle variations on the accuracy of transient and heated-coating liquid-crystal methods for determining the local heat transfer coefficients on a curved surface. A developed liquid-crystal calibration technique using a true-color image processing system has been used to alleviate the effect of viewing angle on oblique/curved surfaces. The accuracy of heat transfer coefficients improved significantly with careful correction of the viewing-angle effect on the surface geometry. It is crucial to ensure the implementation of the suggested calibration technique to be used in wideband thermochromic liquid-crystal applications on the non-orthogonal surface.

Journal

Experiments in Fluids – Springer Journals

Published: Oct 1, 2001

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