Analysis of the Conditions for Determining the Thermal Diffusivity of Organic Liquids by the Laser Pulse Method

Abstract

The conditions for conducting experiments to determine the thermal diffusivity of organic liquids by the laser pulse method are analyzed. Under the surface action of a thermal pulse of high power and short duration, the problem of a nonstationary temperature field of a three-layer sample is solved numerically. We establish limits on the range of possible changes in the flux density of the laser beam, which correspond to the conditions for the reliable calculation of the thermal diffusivity of a typical organic liquid, ethanol. The influence of the thickness of the liquid layer on the error of finding the thermal diffusivity is shown.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Measurement Techniques
DOIs	https://doi.org/10.1007/s11018-017-1221-4
Publication status	Accepted/In press - 18 Aug 2017

Keywords

ethanol
laser pulse method
numerical modeling
thermal diffusivity

ASJC Scopus subject areas

Instrumentation
Applied Mathematics

Access to Document

10.1007/s11018-017-1221-4

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Kuznetsov, G. V., & Katz, M. D. (Accepted/In press). Analysis of the Conditions for Determining the Thermal Diffusivity of Organic Liquids by the Laser Pulse Method. Measurement Techniques, 1-6. https://doi.org/10.1007/s11018-017-1221-4

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AB - The conditions for conducting experiments to determine the thermal diffusivity of organic liquids by the laser pulse method are analyzed. Under the surface action of a thermal pulse of high power and short duration, the problem of a nonstationary temperature field of a three-layer sample is solved numerically. We establish limits on the range of possible changes in the flux density of the laser beam, which correspond to the conditions for the reliable calculation of the thermal diffusivity of a typical organic liquid, ethanol. The influence of the thickness of the liquid layer on the error of finding the thermal diffusivity is shown.

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