Quasi-static bubble formation on submerged orifices

被引：119

作者：

Gerlach, D

Biswas, G ^{[1
]}

Durst, F

Kolobaric, V

机构：

[1] Indian Inst Technol, Dept Mech Engn, Kanpur 208016, Uttar Pradesh, India

[2] Univ Erlangen Nurnberg, Lehrstuhl Stromungsmech, D-91058 Erlangen, Germany

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2005年 / 48卷 / 02期

关键词：

bubble formation; submerged orifices; aeration by bubbles;

D O I：

10.1016/j.ijheatmasstransfer.2004.09.002

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The static formation of air bubbles emanating from a submerged orifice was analyzed based on the principles of force balance. The analysis was corroborated by experiments using a shadow imaging technique. The influence of the Young contact angle of the three material components was investigated by identifying two modes of formation, corresponding to bubble formation at the orifice rim and spreading of the bubble base on the horizontal surface around the bubble. The characteristics of the formation process such as shape, height and volume of the bubble and the non-dimensional pressure difference at the orifice are given for both modes up to the critical equilibrium, defined by the maximum bubble volume, at which the bubble releases dynamically. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：425 / 438

页数：14