Thermal Diffusivity of Liquid Germanium.

Electron ’ drift velocity and diffusivity in germanium

Experimental results for electron drift velocity and diffusivity in germanium, obtained with the time-of-flight technique in hyperpure material. are presented for temperatures between 8 and 240 K and fields between 1 and 104,V/cm oriented along (111) and (100) directions. An anisotropy of the drift velocity and of the diffusion coefficient is found with the electric field applied along (111) an...

Thermal Diffusivity of Ceramics During Neutron Irradiation

Measurement 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. ...

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...

Comparison 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.