Thermal Waves, Thermal Diffusivity and Possibility of Relaxation Time of Materials Evaluation

International Journal of Applied Physics

© 2019 by SSRG - IJAP Journal

Volume 6 Issue 3

Year of Publication : 2019

Authors : Nikolai I. Kobasko

10.14445/23500301/IJAP-V6I3P111

How to Cite?

Nikolai I. Kobasko, "Thermal Waves, Thermal Diffusivity and Possibility of Relaxation Time of Materials Evaluation," SSRG International Journal of Applied Physics, vol. 6,  no. 3, pp. 66-73, 2019. Crossref, https://doi.org/10.14445/23500301/IJAP-V6I3P111

Abstract:

In the paper the evidences of existing thermal waves during quenching steel probes in liquid media are provided. It is supported by theoretical consideration and accurate experiments. Practically, thermal waves can be depicted by thermocouples if quenching is performed in electrolytes. In this case, the double electrical layer acts like an amplifier for thermal wave distribution. The double electrical layer eliminates full film boiling process
and is responsible for self – regulated thermal process establishment. The speed of thermal wave distribution and duration of self – regulated thermal process are used for thermal diffusivity and relaxation time of materials evaluation. Obtained by such a way results are used for film boiling prediction, initial heat flux density calculation and quenching recipes development. The obtained in the paper results can be used by engineers and scientists dealing with investigation of physical properties of materials.

Keywords:

Thermal waves, double electrical layer, speed of wave, thermal diffusivity, relaxation time, initial heat flux density, recipes, practical use.

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