Heat conduction and laser beam deflection model using combined finite difference method for transient photothermal displacement technique

Ionel Valeriu Grozescu; Mohd Maarof Moksin; W. Mahmood Mat Yunus

doi:10.1117/12.582921

21 October 2004 Heat conduction and laser beam deflection model using combined finite difference method for transient photothermal displacement technique

Ionel Valeriu Grozescu, Mohd Maarof Moksin, W. Mahmood Mat Yunus

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Proceedings Volume 5581, ROMOPTO 2003: Seventh Conference on Optics; (2004) https://doi.org/10.1117/12.582921
Event: ROMOPTO 2003: Seventh Conference on Optics, 2003, Constanta, Romania

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.

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Ionel Valeriu Grozescu, Mohd Maarof Moksin, and W. Mahmood Mat Yunus "Heat conduction and laser beam deflection model using combined finite difference method for transient photothermal displacement technique", Proc. SPIE 5581, ROMOPTO 2003: Seventh Conference on Optics, (21 October 2004); https://doi.org/10.1117/12.582921

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KEYWORDS

Laser beam diagnostics

Refractive index

Liquids

Finite difference methods

Sensors

3D modeling

Fused deposition modeling

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