Experimental study of dynamic contact angles in liquid-liquid microfluidic plug flow with partial wetting

被引：3

作者：

Kovalev, A., V ^{[1
]}

Yagodnitsyna, A. A. ^{[1
]}

Bilsky, A., V ^{[1
]}

机构：

[1] Kutateladze Inst Thermophys SB RAS, Novosibirsk, Russia

来源：

XXXVI SIBERIAN THERMOPHYSICAL SEMINAR (STS 36) | 2020年 / 1677卷

基金：

俄罗斯科学基金会;

关键词：

BUBBLES; SURFACE; SHAPE;

D O I：

10.1088/1742-6596/1677/1/012064

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Partial wetting of walls by immiscible liquids in microfluidic flows is a crucial parameter for heat and mass transfer applications. Dynamic contact angles, which characterize wettability, are studied experimentally for different liquid-liquid sets in microchannels with 200x400 mu m and 120x240 mu m cross-sections. An appropriate algorithm is chosen for meniscus shape approximation. Cox-Voinov law is found to predict correctly advancing contact angles in liquid-liquid flow. The generalized version of Cox-Voinov law is proposed for the liquid sets with different physical properties. Based on experimental data, new dependences of receding contact angle on contact line velocity are provided for the systems with concave and convex rear meniscus of a plug.

引用

页数：7

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