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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 27 — Sep. 20, 2014
  • pp: G74–G83

Measurement of natural convective heat transfer coefficient along the surface of a heated wire using digital holographic interferometry

Varun Kumar, Manoj Kumar, and Chandra Shakher  »View Author Affiliations

Applied Optics, Vol. 53, Issue 27, pp. G74-G83 (2014)

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In this paper, the local convective heat transfer coefficient (h) is measured along the surface of an electrically heated vertical wire using digital holographic interferometry (DHI). Experiments are conducted on wires of different diameters. The experimentally measured values are within the range as given in the literature. DHI is expected to provide a more accurate local convective heat transfer coefficient (h) as the value of the temperature gradient required for the calculation of “h” can be obtained more accurately than by other existing optical interferometric techniques without the use of a phase shifting technique. This is because in digital holography phase measurement accuracy is expected to be higher.

© 2014 Optical Society of America

OCIS Codes
(120.2880) Instrumentation, measurement, and metrology : Holographic interferometry
(120.6780) Instrumentation, measurement, and metrology : Temperature
(090.1995) Holography : Digital holography
(100.5088) Image processing : Phase unwrapping

Original Manuscript: April 15, 2014
Revised Manuscript: June 19, 2014
Manuscript Accepted: June 19, 2014
Published: July 31, 2014

Varun Kumar, Manoj Kumar, and Chandra Shakher, "Measurement of natural convective heat transfer coefficient along the surface of a heated wire using digital holographic interferometry," Appl. Opt. 53, G74-G83 (2014)

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