An investigation of behaviours of a single bubble in a uniform electric field
An investigation of behaviours of a single bubble in a uniform electric field
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DOI：
10.1016/j.expthermflusci.2005.12.003
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发表时间：
2006-06
影响因子：
3.2
通讯作者：
W. Dong;Ruiyang Li;Hongling Yu;Yuying Yan
中科院分区：
文献类型：
--
作者：
W. Dong;Ruiyang Li;Hongling Yu;Yuying Yan
华盛顿特区的影响。研究了电场对气泡生长、变形和剥离等行为的影响。对气泡行为进行了实验模拟，并数值计算了作用在气泡上的电动力。结果表明，电应力的水平分量对气泡产生强烈的压缩作用，垂直分量对气泡产生拉长作用，从而形成沿电场方向的长球形气泡。研究表明，气泡变形率和接触角均随电场强度的增大而增大。在一定电压下的电场作用下，较大的气泡在离开壁面时通常会破裂成较小的气泡。此外，还讨论了EHD诱导的气泡行为对沸腾换热的影响。
The effects of a d.c. electric field on bubble behaviours such as bubble growth, deformation and detachment are investigated. The bubble behaviours are simulated experimentally and the electric force acting on bubble is calculated numerically. The results indicate that bubbles are compressed intensely by the horizontal component of the electric stress and elongated by the vertical component, thus prolate spherical bubbles in the direction of electric field are formed. The investigation shows that both the rate of bubble deformation and the contact angle increase with electric field strength. Under the action of the electric field at a certain voltage, a larger bubble normally breaks into smaller ones while departing from the wall. In addition, the effects of the EHD induced bubble behaviours on boiling heat transfer are discussed.