منابع مشابه
Novel Measurement of Anisotropic Thermal Diffusivity
We describe a method for the measurement of thermal diffusivity of anisotropic materials. The technique uses a single pulse of light from a flashlamp on the front surface of a slap of material, part of which is shadowed by a rectangular mask. By fitting the measured rear surface temperature distributions as a function of time and space to a theoretical model, we obtain the thermal diffusivities...
متن کاملComparison of thermal diffusivity measurement techniques
Thanks to the collaboration between two laboratories, we present different techniques to measure thermal diffusivity. A brief description of any technique both in the experimental layout and in the processing algorithms is given. Results obtained on samples cut from the same block of stainless steel AISI 304, are reported. Uncertainty evaluation of any measurement is reported as well.
متن کاملMeasurement Thermal Conductivity and Thermal Diffusivity of Chromium Nanofluids
In this study, nanofluids of Chromium (Cr) in water, Ethylene Glycol and Ethanol have been prepared using single step method. The thermal conductivity and diffusivity of these nanofluids were measured via hot wire-photothermal deflection technique. Based on finite difference method (FDM) temperature distribution and photothermal deflection caused by the hot wire inside nanofluids was obtained. ...
متن کاملQuantitative Thermal Diffusivity Imaging of Disbonds in Thermal Protective Coatings Using Inductive Heating D
Problems of adherence of thermal protective coatings to aerospace structures have become important with their use on vehicles such as the space shuttle and for jet engine turbine blades. In these structures a dielectric coating which acts as a thermal barrier. is bonded to a conductive substrate. Failure of these coatings to adhere to the substrate can result in catastrophic failure of the vehi...
متن کاملMeasurement of thermal diffusivity by magnetic resonance imaging.
Nuclear magnetic resonance (NMR) may be used for monitoring temperature changes within samples based on measurements of relaxation times, the diffusion coefficient of liquids, proton resonance frequency or phase shifts. Such methods may be extended to the explicit measurement of the thermal diffusivity of materials by NMR imaging. A method based on measuring nuclear spin phase shifts or changes...
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ژورنال
عنوان ژورنال: KAGAKU KOGAKU RONBUNSHU
سال: 1983
ISSN: 0386-216X,1349-9203
DOI: 10.1252/kakoronbunshu.9.129