摘要
借助有限元方法分析计算了气中水滴和水中气泡两类掺杂介质在电场作用下所受力,包括电场力在两相介质交界面上的分布规律、掺杂介质大小及位置改变时作用力的变化、作用力对掺杂介质形态和运动的影响等。分析结果表明,掺杂介质在电场中所受力作用在交界面上,方向由介电常数大的介质指向小的介质,二者介电常数相差很大时作用力与交界面法线方向相同,作用力在交界面上的分布与反应器电极结构尺寸、介质相态、掺杂介质形状尺寸及在反应器中的位置和电场分布局部畸变等有关。气中水滴受电场线方向的拉伸作用,水中气泡受等位线方向的压缩作用,越靠近电极受力越大,水滴受电场力合力指向线电极,气泡则相反,合力将影响其运动状态。
By means of the finite element analysis, it indicates that the electric field force on impurities is on the boundary of the two phases medium and its direction is from the less dielectric constant to the bigger one. The direction of the force is as same as the boundary normal when there is big difference in dielectric constants in two phases medium. The force distribution on the boundary is relative to the configuration and size of electrodes, the medium＇s phase states, the figure and size of impurities and their positions in the reactor, and also the aberrance of electric field. The drips in air get pulling force by the direction of the electric lines of force, while the bubbles in water get pushing force by the direction of the equipotential lines, and the closer to the line electrode the greater the forces are. The composition of electric field forces on drips points to the line electrode, which is opposite to bubble, and affects the moving state of drips/bubbles.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2006年第2期57-59,83,共4页
High Voltage Engineering
基金
哈尔滨工业大学跨学科交叉性研究基金(批准号:HIT.MD2002.1)
关键词
电场力
放电反应
水滴
气泡
有限元分析
electric field force
discharging react
drip
bubble
finite element analysis
