Abstract—

For the first time, the evolution of the spreading pattern of a fallen water drop over the surface of a cavity and a crown in a deep layer of oil has been traced by high-resolution video and photography. At the stage of active drop submergence, the double layer formed by the contacting surfaces of immiscible fluids is the most rapid component of the flow. Droplets containing both fluids fly out from the tops of the spikes on the edge of the crown. The water covering the inner surface of the cavity and the crown flows unevenly downwards after submergence of the drop. Isolated anhydrous areas, voids, are formed on the surface of the crown and are separated by narrow bands of water, which eventually break up into separate drops. The bulk of the water unevenly submerges to the bottom of the cavity and, at its collapses, remains in the bulk of the liquid in the form of individual fragments, gradually tightening into smooth droplets. The regularities of the temporal changes in the splash height and in the shape of the cavity section are revealed.

中文翻译：

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水滴在油层中的扩散

摘要-

高分辨率视频和摄影技术首次追踪到下落的水滴在型腔表面和深层油层中的冠状物上方扩散的分布方式的演变。在主动液滴浸没阶段，由不混溶流体的接触表面形成的双层是流中最快速的成分。包含两种液体的液滴从表冠边缘的尖峰顶部飞出。水滴浸没后，覆盖腔体和表冠内表面的水向下不均匀地向下流动。孤立的无水区域（空隙）形成在表冠的表面，并被狭窄的水带分隔开，这些水带最终分解成单独的水滴。大部分水不均匀地浸没在腔体的底部，在塌陷时，以单个碎片的形式保留在液体中，逐渐收紧成光滑的液滴。揭示了飞溅高度和空腔部分形状的时间变化规律。