Experimental study of gas injected bubble growth from submerged orifices

被引：117

作者：

Di Bari, Sergio ^{[1
]}

Robinson, Anthony J. ^{[1
]}

机构：

[1] Univ Dublin Trinity Coll, Dept Mech Engn, Dublin 2, Ireland

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2013年 / 44卷

基金：

爱尔兰科学基金会;

关键词：

Bubble growth; Bubble departure; Submerged orifice; NUMERICAL-SIMULATION; WETTING CONDITIONS; INVISCID LIQUID; FLOW; DETACHMENT; MODEL; DEPARTURE; QUIESCENT; DYNAMICS; SHAPE;

D O I：

10.1016/j.expthermflusci.2012.06.005

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This work investigates the mechanism of adiabatic gas bubble growth from submerged orifices with the view of elucidating the interdependence of the bubble shape and the pressure field during growth and departure. Air injection flow rates between 10 mlph and 100 mlph have been tested for orifices of diameters 0.58 mm, 1.05 mm and 1.6 mm. The force field around single isolated bubbles during growth and detachment has been investigated experimentally with the aid of high speed photography and detailed image processing and measurement of the internal bubble pressure. Different flow rates have been compared in order to elucidate dynamic effects. Combining measurements of the instantaneous gas pressure, measurements of the local curvature and the Young-Laplace equation has allowed the estimation of the liquid pressure field acting on the gas-liquid interface over the entire bubble surface. These have subsequently been decomposed into constitutive components such as buoyancy, contact pressure, capillary and the dynamic pressure forces. (C) 2012 Elsevier Inc. All rights reserved.

引用

页码：124 / 137

页数：14

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