The role of geometry on controlled cavity collapse and top jet drop
The role of geometry on controlled cavity collapse and top jet drop
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DOI：
10.1063/5.0097090
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发表时间：
2022-07
影响因子：
4.6
通讯作者：
Nilofar Taraki;A. Said Ismail
中科院分区：
文献类型：
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作者：
Nilofar Taraki;A. Said Ismail
研究了喷嘴板角(θ)、高度(H)和容器半径(R)这三个几何参数对液面受控空泡坍塌和后续喷射液滴的影响。数值模拟结果表明，喷嘴板在一个方向上由平面角变为斜面角会使液滴直径变小，相反方向倾斜会导致液滴变大。此外，只要容器高度远大于喷嘴半径(R0)，改变流体容器的高度实际上不会影响液滴的大小和速度。在限制H=5R0以下，随着容器高度的降低，液滴尺寸开始减小，液滴速度开始增加。最后，即使当R≫R0时，液滴尺寸也会随着流体容器半径的增加而减小。这归因于当容器半径改变时，被置换的液体体积以及随后喷嘴尖端的空腔体积的变化。
The contents of this work explore the influence of three geometric parameters on controlled cavity collapse at liquid interface and the subsequent ejected drop; the parameters are the angle of the ejecting nozzle plate (θ), the height (H), and the radius (R) of the vessel used to enclose the liquid within. The conducted computational modeling shows that changing the angle of the nozzle plate from a flat surface to inclined surface in one direction causes the droplet diameter to decrease, whereas an inclination in the opposite direction results in larger droplets. Moreover, changing the height of the fluid vessel does not actually influence the drop size and its velocity as long as the vessel height is much larger than the nozzle radius (R0). Below the limit H = 5R0, the droplet size starts to decrease and its velocity to increase by decreasing the vessel height. Finally, the droplet size decreases by increasing the radius of the fluid vessel even when R ≫ R0. This is attributed to the change in the displaced liquid volume and subsequently the cavity volume at the tip of the nozzle when the vessel radius is changed.