Foam drainage wave coalescing and its energy evolution  

作　　者：SUN QiCheng HUANG Jin WANG GuangQian 

机构地区：[1]State Key Laboratory for Hydroscience and Engineering, Tsinghua University, Beijing 100084, China [2]Institute for Corrosion and Multiphase Technology, Ohio University, Ohio 45701, USA

出　　处：《Chinese Science Bulletin》2008年第20期3138-3141,共4页

基　　金：the National Natural Science Foundation of China (Grant No.20776142)

摘　　要：Liquid foam is a dense packing of gas bubbles in a small amount of surfactant solution. Liquid drains out of foams until equilibrium is reached due to the compromise between gravity and capillarity, which greatly affects the stability of foam. Based on a series of work on foam structure and drainage we conducted previously, this paper reports the results on coalescence of an original forced drainage wave at a low flow rate with subsequent drainage waves with higher flow rates. The evolutions of viscous energy and surface energy during the process of coalescence are theoretically analyzed.Liquid foam is a dense packing of gas bubbles in a small amount of surfactant solution. Liquid drains out of foams until equilibrium is reached due to the compromise between gravity and capillarity, which greatly affects the stability of foam. Based on a series of work on foam structure and drainage we conducted previously, this paper reports the results on coalescence of an original forced drainage wave at a low flow rate with subsequent drainage waves with higher flow rates. The evolutions of viscous energy and surface energy during the process of coalescence are theoretically analyzed.

关 键 词：液体泡沫 排水 泡沫物理学 表面活性剂 能量变化 

分 类 号：O35[理学—流体力学]