毛细聚焦滴模式下液滴形成的动力学行为

Q1 Physics and Astronomy

Capillarity Pub Date : 2021-07-02 DOI:10.46690/capi.2021.03.01

T. Si

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引用次数: 1

摘要

对毛细管流动聚焦过程中液体滴下进行了实验研究。由于高速气流驱动内部液体共流通过孔板，在滴落状态下，随着气体压力的下降和液体流量的变化，液滴形成的复杂现象。周期滴法可以产生均匀的水滴，非周期滴法可以产生不同直径的卫星和水滴。还得到了共流气流核心处的液滴-液滴聚并现象。在不同的气压降和液体流速下，测量了所得液滴的大小。可以看出，随着气体压降的增大，液滴尺寸有减小的趋势，随着液体流量的增大，液滴尺寸基本保持不变。结果还表明，毛细聚焦滴注模式下的液滴形成动力学行为主要受气体压降的影响，毛细聚焦技术即使在滴注状态下也能产生高通量的液滴。引自:Si, T.毛细聚焦滴模式下液滴形成的动力学行为。毛细管学，2021,4(3):45-49,doi: 10.46690/capi.2021.03.01

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Dynamic behavior of droplet formation in dripping mode of capillary ﬂow focusing

Experimental study on the liquid dripping in a capillary ﬂow focusing process is performed. Due to the high-speed gas stream that drives the inner liquid co-ﬂowing through an oriﬁce, complex phenomena for the droplet formation in dripping regime can be found as the gas pressure drop and the liquid ﬂow rate change. Periodic dripping mode can produce uniform droplets, and non-periodic ones can result in satellites and droplets of different diameters. The droplet-droplet coalescence in the core of co-ﬂowing gas stream is also obtained. The size of resultant droplets is measured under different values of gas pressure drop and liquid ﬂow rate. It can be seen that the droplet size tends to decrease as the gas pressure drop increases and keeps nearly the same as the liquid ﬂow rate increases. The results also indicate that the dynamic behavior of droplet formation in dripping mode of capillary ﬂow focusing is mainly dominated by the gas pressure drop, and the capillary ﬂow focusing technique can produce droplets with high throughput even in the dripping regime. Cited as: Si, T. Dynamic behavior of droplet formation in dripping mode of capillary ﬂow focusing. Capillarity, 2021, 4(3): 45-49, doi: 10.46690/capi.2021.03.01

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来源期刊

Capillarity Physics and Astronomy-Surfaces and Interfaces

CiteScore

7.10

自引率

0.00%

发文量

审稿时长

2~3 weeks

期刊介绍： Capillarity publishes high-quality original research articles and current reviews on fundamental scientific principles and innovations of capillarity in physics, chemistry, biology, environmental science and related emerging fields. All advances in theoretical, numerical and experimental approaches to capillarity in capillary tube and interface dominated structure and system area are welcome. The following topics are within (but not limited to) the scope of capillarity: i) Capillary-driven phenomenon in natural/artificial tubes, porous and nanoporous materials ii) Fundamental mechanisms of capillarity aided by theory and experiments iii) Spontaneous imbibition, adsorption, wicking and related applications of capillarity in hydrocarbon production, chemical process and biological sciences iv) Static and dynamic interfacial processes, surfactants, wettability, film and colloids v) New approaches and technologies on capillarity Capillarity is a quarterly open access journal and free to read for all. The journal provides a communicate platform for researchers who are interested in all fields of capillary phenomenon.