The effect of viscosity on liquid curtain stability was explored by high-speed visualization. Measurements of the velocity within the curtain revealed the presence of a viscous boundary layer along the edge guides. The critical condition at the onset of curtain breakup was determined by identifying the flow rate below which the curtain broke for two different edge guide geometries: parallel and convergent. Curtain breakup was initiated by the expansion of a hole within the curtain. For low viscosity liquid, the measured hole retraction speed is independent of the viscosity and equal to the Taylor-Culick speed. For high viscosity liquids, the retraction speed is lower than the Taylor-Culick speed due to viscous forces that resist the flow. The results also show the effect of liquid viscosity on the curtain stability is a strong function of the edge guide design. © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译：

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粘度对液帘稳定性的影响

通过高速可视化探索了粘度对液帘稳定性的影响。窗帘内速度的测量结果表明，沿边缘导轨存在粘性边界层。窗帘破裂开始时的临界条件是通过确定流速来确定的，在该流速下，对于两个不同的边沿引导几何形状（平行和会聚），窗帘破裂。窗帘破裂是由窗帘内孔的扩大引起的。对于低粘度液体，测得的空穴退回速度与粘度无关，等于泰勒-克里克速度。对于高粘度液体，由于阻碍流动的粘性力，其回缩速度低于泰勒-克里克速度。结果还表明，液体粘度对窗帘稳定性的影响是边缘导轨设计的强大功能。©2017美国化学工程师学会AIChE的Ĵ，2017年