Granular thermal diffusion in flows of binary-sized mixtures

S. S. Hsiau, M. L. Hunt

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The revised Enskog theory was employed to analyze granular flows of binary-sized mixtures. The governing equations and constitutive relations were used to investigate granular thermal diffusion - a diffusion process resulting from the granular temperature gradient. The granular thermal diffusion causes the smaller or the lighter particles to concentrate in the region of the flow with higher granular temperature, and causes the larger or the heavier particles to concentrate in a region of lower granular temperature. A granular flow of binary mixtures in an oscillatory no-flow system and in a sheared system was examined, and indicated a complete segregation when the granular thermal diffusion was sufficiently large.

Original languageEnglish
Pages (from-to)121-137
Number of pages17
JournalActa Mechanica
StatePublished - 1996


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