When two identical drops evaporate simultaneously in close vicinity, the vapours of one drop affect the evaporation of the neighbouring one. The evaporation rate is found to decrease. The effect decreases when the in between spacing increases. The internal circulation, which is visualized, is observed to show the same behaviour. The circulation is slower for the nearer drops, but increases and becomes equal to that of a single drop of equal size when the spacing increases. The reason is found to be the formation of a film in the surroundings, and its flow caused dominantly by the natural convection outside. The weak flow is able to sweep out the vapours formed when the distance is larger due to lower mass accumulation.

中文翻译：

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间距对两个相同液滴的蒸发和内部循环的影响

当两个相同的液滴在附近同时蒸发时，其中一个液滴的蒸气会影响相邻液滴的蒸发。发现蒸发速率降低。当间隔之间的距离增加时，效果会降低。观察到的内部循环显示出相同的行为。对于较近的液滴，循环较慢，但当间距增大时，循环增大并变得等于大小相等的单个液滴。发现原因是在周围环境中形成了薄膜，其流动主要是由外部的自然对流引起的。当距离较远时，由于较低的质量积聚，弱流能够清除形成的蒸气。