摘要
基于耗散粒子动力学方法,建立了电场作用下近似的液滴粒子力学模型,对两相不相溶液体中液滴在电场作用下的变形特性进行了模拟。模拟结果与他人的实验结果比较表明,模拟结果对液滴形状随时间的演化预测基本符合实际,仅在液滴变形较大时有一定偏差。模拟结果还表明,当外加场强较小时,液滴变形度随时间呈现振荡状态,变形度不会随时间继续增大。增大外加场强,液滴变形幅度增大,振荡频率变慢。当外加场强增大到一定程度时,液滴变形度不再振荡,而是随时间急剧增大,以至液滴最终破碎。场强越大,液滴破碎所需的时间也越短。
Based on DPD method, a particle mechanical model of the droplet in immiscible liquid in a uniform electric field was developed and the drop deformation process was simulated. There was better consistency in drop shape between simulation and experiment, and deviation was observed only in the case of large deformation. The simulated results also showed that at lower electric field strength drop deformation did not grow up with time, but was in an oscillation state. With increasing electric field strength, oscillation amplitude of droplet deformation increased while oscillation frequency decreased. When field strength increased to a specific value, oscillation could not be maintained and drop deformation sharply increased with time, leading to droplet breakup. The higher the field strength, the shorter the time required for drop breakup.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2014年第10期3872-3877,共6页
CIESC Journal
基金
福建省自然科学基金项目(2014J01201)
福建省高校专项(JK2012027)~~
关键词
电场
液滴变形
耗散粒子动力学
模拟
算法
界面张力
electric field
drop deformation
dissipative particle dynamics
simulation
algorithm
interfacial tension
