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Proceedings Paper

Heat conduction and laser beam deflection model using combined finite difference method for transient photothermal displacement technique
Author(s): Ionel Valeriu Grozescu; Mohd Maarof Moksin; W. Mahmood Mat Yunus
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Paper Abstract

A numerical model of the heat conduction and laser beam deflection in a fluid heated by a thin, cylindrical resistance wire is presented. The model, developd using combined finite difference method technique is used to determine the temperature distribution in a test fluid sample and the heating wire. A probe laser beam passing through the sample is deflected by the refractive index gradient caused by the temperature gradient. The transient probe beam deflection can be recorded using a position sensitive detector. Simultaneous determination of the thermal diffusivity and thermal conductivity of the test fluid is possible by comparing the theoretical results of the probe beam deflection and the experimentally measured deflection.

Paper Details

Date Published: 21 October 2004
PDF: 10 pages
Proc. SPIE 5581, ROMOPTO 2003: Seventh Conference on Optics, (21 October 2004); doi: 10.1117/12.582921
Show Author Affiliations
Ionel Valeriu Grozescu, Univ. Putra Malaysia (Malaysia)
Mohd Maarof Moksin, Univ. Putra Malaysia (Malaysia)
W. Mahmood Mat Yunus, Univ. Putra Malaysia (Malaysia)

Published in SPIE Proceedings Vol. 5581:
ROMOPTO 2003: Seventh Conference on Optics
Valentin I. Vlad, Editor(s)

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