矩形和三角形通道内气泡溃灭时的射流方向
Jet direction in bubble collapse within rectangular and triangular channels
摘要：
在液体中，在固体边界附近破裂的蒸汽泡产生指向边界的液体射流。这种射流的方向已被研究的边界，如平面和平行的墙壁包围一个通道。扩展这些调查封闭的多边形边界，我们实验测量射流方向崩溃的气泡内的正方形和等边三角形通道。遵循Tagawa和Peters（Phys. Rev. Fluids 3，081601，2018）预测拐角处射流方向的方法，我们将气泡建模为势流中的水槽，并通过实验证明，解析解可以准确预测等边三角形和正方形内的射流方向。我们进一步使用该方法来开发其他几个多边形的预测，特别是矩形，等腰直角三角形，和$30^{\circ}$ - $60^{\circ}$-$90^{\circ}$直角三角形。
英文摘要：
A vapor bubble collapsing near a solid boundary in a liquid produces a liquid jet that points toward the boundary. The direction of this jet has been studied for boundaries such as flat planes and parallel walls enclosing a channel. Extending these investigations to enclosed polygonal boundaries, we experimentally measure jet direction for collapsing bubbles inside a square and an equilateral triangular channel. Following the method of Tagawa and Peters (Phys. Rev. Fluids 3, 081601, 2018) for predicting the jet direction in corners, we model the bubble as a sink in a potential flow and demonstrate by experiment that analytical solutions accurately predict jet direction within an equilateral triangle and square. We further use the method to develop predictions for several other polygons, specifically, a rectangle, an isosceles right triangle, and a $30^{\circ}$-$60^{\circ}$-$90^{\circ}$ right triangle.
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