Journal ArticleDOI
Measurement of the In-plane Thermal Diffusivity of Materials by Infrared Thermography
TLDR
In this paper, a transient method using the Laplace transform for estimation of the in-plane thermal diffusivity of low conductive materials is presented, which does not require a knowledge of the stimulation and boundary conditions by using two reference temperature profiles.Abstract:
A transient method using the Laplace transform for estimation of the in-plane thermal diffusivity of low conductive materials is presented. The temperature field of the sample is measured by infrared thermography. The main interest of the technique proposed here is to not require a knowledge of the stimulation and boundary conditions by using two reference temperature profiles. The parameter estimation is implemented in the time domain by an inverse technique using numerical Laplace inversion and convolution products. A sensitivity study has been carried out to optimize the choice of the two reference profiles. The effect of a space varying heat transfer coefficient on the estimated values of the unknown parameters has also been evaluated. Finally, the apparatus is described and experimental results obtained for a low conductive material like a vitroceramic are shown.read more
Citations
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Journal ArticleDOI
Heat transfer—A review of 2005 literature
Richard J Goldstein,W. E. Ibele,Suhas V. Patankar,Terrence W. Simon,Thomas H. Kuehn,Paul J Strykowski,Kumar K. Tamma,Joachim Heberlein,Jane H. Davidson,John C. Bischof,Francis A Kulacki,Uwe Kortshagen,Sean C. Garrick,Vinod Srinivasan,Kalyanjit Ghosh,Rajat Mittal +15 more
TL;DR: A review of the heat transfer literature published in 2005 can be found in this article, where the authors restrict themselves to papers published in English through a peer-review process, with selected translations from journals published in other languages.
Journal ArticleDOI
Non-contact methods for thermal properties measurement
TL;DR: In this paper, the authors provide an overview of basic principles for thermal measurement along with associated theoretical model necessary for data reduction and their main applications, and summarize the main advantages and disadvantages of these techniques along with their associated uncertainties.
Journal ArticleDOI
Experimental determination and modeling of thermal conductivity tensor of carbon/epoxy composite
TL;DR: In this article, the effective thermal conductivity tensor of carbon/epoxy laminates is investigated experimentally in the three states of a typical LCM-process: dry reinforcement, raw and cured composite.
Journal ArticleDOI
An experimental device for the simultaneous estimation of the thermal conductivity 3-D tensor and the specific heat of orthotropic composite materials
TL;DR: In this article, the thermal properties of a unidirectional carbon-fiber composite have been characterized using a home-designed thin heater, composed by two distinct heating elements and sandwiched between two cylindrical samples.
Journal ArticleDOI
Global and local characterization of the thermal diffusivities of SiCf/SiC composites with infrared thermography and flash method
Matthieu Bamford,Marcio Florian,Gerard L. Vignoles,Jean-Christophe Batsale,Carlos Alberto Alves Cairo,Laurence Maillé +5 more
TL;DR: In this article, two types of SiCf/SiC composites with different matrix quantities are prepared by CVR from pyrolyzed Carbon/resin composites, and various assessment methods are implemented to measure simultaneously transverse and in-plane thermal diffusivities, globally and locally; the emphasis is set on the accuracy of the estimations.
References
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Journal ArticleDOI
A method for the solution of certain non – linear problems in least squares
TL;DR: In this article, the problem of least square problems with non-linear normal equations is solved by an extension of the standard method which insures improvement of the initial solution, which can also be considered an extension to Newton's method.
Journal ArticleDOI
Flash Method of Determining Thermal Diffusivity, Heat Capacity, and Thermal Conductivity
TL;DR: In this paper, a high-intensity short-duration light pulse is absorbed in the front surface of a thermally insulated specimen, and the resulting temperature history of the rear surface is measured by a thermocouple and recorded with an oscilloscope and camera.
Journal ArticleDOI
An Improved Method for Numerical Inversion of Laplace Transforms
TL;DR: In this article, an improved procedure for numerical inversion of Laplace transforms is proposed based on accelerating the convergence of the Fourier series obtained from the inversion integral using the trapezoidal rule.