5041 ハーフゾーン液柱内温度差マランゴニ対流の線形安定性における自由表面局在化の効果(J09-2 熱流体輸送および反応流の実験的及び数値的解析(2),J09 熱流体輸送および反応流の実験的及び数値的解析)

概要

論文の詳細を見る
The thermocapillary flow in a low-Prandtl-number half-zones is investigated numerically in the case that the free surface is partially confined by thin solid walls. The linear stabilities to three-dimensional disturbances and their physical destabilizing mechanisms are addressed, with variations of the aspect ratio of the liquid bridge, the axial position of the free surface, and the ratio ξ of the free surface length to the full liquid height are considered. With decreasing ξ it is found that the contribution of the elliptic mechanism on the instability fades away and that the relative importance of the centrifugal mechanism consequently increases. The balance change of those mechanism leads to four different instability modes, including two oscillatory modes. For a sufficiently small ξ the instability appears to be purely centrifugal.
2006-09-15