Tracing Thermal Creep Through Granular Media
作者： Tobias Steinpilz , Jens Teiser , Marc Koester , Mathias Schywek , Gerhard Wurm
DOI: 10.1007/S12217-017-9550-0
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摘要: A temperature gradient within a granular medium at low ambient pressure drives gas flow through the by thermal creep. We measured resulting air for sample of glass beads with particle diameters between 290 μ m and 420 random close packing. Ambient was varied 1 Pa 1000 Pa. The quantified means tracer particles during parabolic flights. varies systematically 0.2 cm/s 6 cm/s. velocities are in quantitative agreement to model calculations that treat as collection linear capillaries.
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