4025 液柱内マランゴニ対流場における粒子集合現象と数値シミュレーション(F-3 フォーラム「界面流体力学の新展開」)

概要

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In thermocapillary convection of a half-zone liquid bridge, a phenomenon called "Spiral Loop-PAS (SL-PAS)" is observed, in which particles gather along a three-dimensional closed single loop. In this paper, the three dimensional numerical simulation of the thermocapillary convection in a half zone liquid bridge is performed to reconstruct the SL-PAS through the finite difference method with employing the Eulerian method for fluid flow and the Lagrangian method for particle motion. In particular, a series of numerical simulation has been conducted for n-Decane (Pr=15 at 25 deg C) with the heat loss to the ambient air being taken into account. An influence of the heat loss to the ambient air on emergence of the SL-PAS is examined. The SL-PAS has been successfully reconstructed in consideration of the heat loss to the ambient air.
一般社団法人日本機械学会の論文
2005-11-17