Journal Article

FZJ-2022-03380

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Heat transfer in granular media with weakly interacting particles

Persson, B. (Corresponding author)FZJ* ; Biele, J.Extern*

2022
American Inst. of Physics New York, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/33026  doi:10.1063/5.0108811

Abstract: We study the heat transfer in weakly interacting particle systems in vacuum. The particles have surface roughness with self-affine fractal properties, as expected for mineral particles produced by fracture, e.g., by crunching brittle materials in a mortar, or from thermal fatigue or the impact of micrometeorites on asteroids. We show that the propagating electromagnetic (EM) waves give the dominant heat transfer for large particles, while for small particles both the evanescent EM-waves and the phononic contribution from the area of real contact are important. As an application, we discuss the heat transfer in rubble pile asteroids.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (PGI-1)

Research Program(s):

1. 5211 - Topological Matter (POF4-521) (POF4-521)

Appears in the scientific report 2022

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