A Rigorous Experimental Technique to Measure the Thermal Diffusivity of Metals in Different 3D Forms

This present work is a continuation and validation of the results explained in a previous paper titled A Rigorous Experimental Technique for Measuring the Thermal Diffusivity of Metals and goes further to describe the notion of dimensionless time tD practical for solving the energy-density field distribution in 4D space. Moreover, the notion of dimensionless time and statistical characteristic length of the 3D material object is introduced, defined and proved effective. We have carried out a preliminary experimental investigation and a theoretical analysis on five 3D geometric objects of different shapes in aluminum and steel and the results obtained for the thermal diffusivity are in good agreement with the thermal tables.