A Thermal Force Drifting Particles Along a Temperature Gradient
Journal: Mechanics, Materials Science & Engineering Journal (Vol.5, No. 1)Publication Date: 2016-08-05
Authors : Amelia Carolina Sparavigna;
Page : 1-1
Keywords : thermal gradient; thermal transport; thermal forces; entropic forces;
Abstract
In 1972, V. Gallina and M. Omini of the Polytechnic of Turin proposed a phenomenological model for the thermal diffusion in liquid metals, explaining the isotope separation as provoked by a thermal force which is arising when a temperature gradient is established in the material. Here, we discuss this thermal force and its statistical origin from the bulk. We will see that it can be considered as a force of the form F = − S grad T, that is as a thermal/entropic force obtained from the derivative of the Helmholtz free energy with respect to the volume.
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