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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Size prediction of drops formed by dripping at a micro T-junction in liquid-liquid mixing
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Size prediction of drops formed by dripping at a micro T-junction in liquid-liquid mixing

机译：液-液混合中微T形点滴落形成的液滴尺寸预测

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摘要

In the present work, the formation of liquid drops by dripping at a micro-scale T-junction with a square cross-section (90×90μm~2) was examined. The drop formation process consists of three stages: X-Y and X-growth stages and a detachment stage. In the X-Y growth stage, the tip of the disperse phase grows both in the longitudinal (X) and lateral (Y) directions to form a bulged shape until a maximum value of Y is reached. Then, in the X-growth stage, the bulged part continues to grow but only in X-direction, followed by the detachment stage to be separated out a single drop through a rapid necking process. The entire process is repeated at regular intervals. The volume of the drop is determined by the Y-directional size of the bulged part at the end of the X-growth stage (S_E) and the detaching time (Δt_(Detach)). Based on the measurement and a simple scale analysis, a correlation to represent the drop size was proposed with the flow rates and fluid properties taken as parameters, and physical interpretations on the correlation were provided as well.
机译：在本工作中，研究了通过在具有方形横截面（90×90μm〜2）的微型T型结处滴落形成液滴的过程。液滴形成过程包括三个阶段：X-Y和X-增长阶段以及分离阶段。在X-Y生长阶段，分散相的尖端在纵向（X）和横向（Y）方向上均生长，形成鼓鼓状，直到达到Y的最大值为止。然后，在X增长阶段，凸出的部分继续增长，但仅在X方向上增长，随后是分离阶段，通过快速颈缩过程将单个液滴分离出来。整个过程会定期重复。液滴的体积由X增长阶段结束时凸起部分的Y方向大小（S_E）和分离时间（Δt_（Detach））确定。基于测量和简单的尺度分析，提出了一种以液滴和流体性质为参数的代表液滴尺寸的相关性，并提供了相关性的物理解释。

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