21218 HZ液柱温度差マランゴニ対流に対する周囲気体の影響(伝熱・二相流,一般講演,学術講演)

概要

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Surface tension and heat/mass transfer through the liquid-gas interface dominate the convective phenomena under microgravity conditions. A large number of researches have been carried out on thermocapillary-driven flow in order to realize high-quality single crystal of semiconductor and alloys in space. Recent works have indicated a significant effect of heat transfer between the liquid concerned and the ambient gas upon the critical condition and oscillatory flow structures in the liquid. Especially in the system of a HZ liquid bridge, in which a liquid is sustained between coaxial rods with temperature difference, experimental and numerical works have illustrated its vigorous effect upon the critical condition. In order to evaluate and actively control that effect, a forced convection is attempted in the ambient gas region around the liquid bridge in the present study. The effect upon the critical conditions, the resultant flow structures, and the unique particle behavior named the PAS (particle accumulation structure) in the bridge are discussed.
一般社団法人日本機械学会の論文
2008-03-13