Thermophysical Properties Identification by Transient Square Periodic Wave Response

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  • 過渡矩形周期加熱による熱物性の同定
  • カト クケイ シュウキ カネツ ニ ヨル ネツ ブッセイ ノ ドウテイ

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Description

A pulse laser is used as a heating source in the laser flash method which is well known measurement method of the thermal diffusivity. In this paper we consider to substitute the semiconductor laser as a heating source for the pulse laser. But in this case, input waveform to a sample is the transient rectangular periodic wave pattern, and the analytic solution to reaction wave pattern is not found immediately. However, it is shown that the numerical value solution of the response wave pattern is easily obtained by use of the high-speed Laplace inverse transformation (FILT) which developed by Hosono. Furthermore, it is able to identify the thermal conductivity as well as a thermal diffusivity of the sample by use of this numerical value solution, subject to the magnitude of input heat flux is known. And it is touched that the general-purpose program of FILT can be written by using the C++ of a programming language. We simulated the identity method for single and two-layer sample to confirm the validity of the method.

Journal

  • Netsu Bussei

    Netsu Bussei 27 (1), 21-26, 2014

    JAPAN SOCIETY OF THERMOPHYSICAL PROPERTIES

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