Determination of droplet contours in liquid-liquid flows within microchannels

被引：5

作者：

Pulvirenti, B. ^{[1
]}

Rostami, B. ^{[1
]}

Puccetti, G. ^{[1
]}

Morini, G. L. ^{[1
]}

机构：

[1] Univ Bologna, Lab Microfluid, Alma Mater Studiorum, DIN, Via Lazzaretto 15-5, I-40131 Bologna, Italy

来源：

33RD UIT (ITALIAN UNION OF THERMO-FLUID DYNAMICS) HEAT TRANSFER CONFERENCE | 2015年 / 655卷

关键词：

T-JUNCTION;

D O I：

10.1088/1742-6596/655/1/012028

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An experimental analysis of the droplet regime with a silicone oil-water two-phase flow within a micro cross-junction, varying the average velocity of the fluids, has been carried out. The micro cross-junction is made as intersection of two glass microchannels with a stadium-shaped cross-section with height II=190 mu m and width W-j=195 mu m within the junction and W=390 mu m before and after the junction. The water flow rate is broken in droplets having spherical shape with dimensions and velocity that depend on the average velocity ratio imposed. Different kinds of intermittent droplets have been observed, in the ranges of average velocity (0.0105-0.042) m/s and (0.0004-0.0050) m/s for oil and water, respectively. The droplet velocity has been calculated starting from the detection of the shape of the droplets and then by the evaluation of the displacement of the droplets in the unit of time. The images of the droplets have been obtained from a high-speed camera, connected to an inverted microscope. The procedure of water phase contour detection is based on Matlab Image Toolbox scripts.

引用

页数：10

共 21 条

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