剪切流场中分散相液滴形变三维力学模型论证  

Theory and Experimental Study on Three-dimensional Mechanical Model of Emulsion Droplets Deformation in Shear Flow

作　　者：王亮[1] 董守平[1] 周建平[1] 郭长会[2] 张明明[1] 王会娟[1] 

机构地区：[1]中国石油大学,北京102249 [2]胜利油田胜利工程设计咨询有限责任公司,山东东营257026

出　　处：《石油化工设备》2011年第2期1-6,共6页Petro-Chemical Equipment

基　　金：国家863计划课题:高频脉冲电场及离心场联合作用下复杂乳化液处理技术(2007AA06Z224);北京市教育委员会重点学科资助项目(No.XK114140594)

摘　　要：针对乳化液破乳机理研究中剪切流场作用下分散相液滴形变模型选择的问题,通过改进设计内、外桶反向旋转剪切实验装置,并结合数字图像处理技术,从实验的角度率先对液滴变形的基本模型进行验证,实验结果表明,液滴在剪切流场中发生三维力学变形。在此基础上进一步对其变形规律及变形机理进行了一定的实验及理论探讨,提出了液滴形变非仿射度概念。通过对剪切流场中变形液滴表面应力分布进行模拟,提出了更加准确的液滴模型描述方法,为今后精确变形液滴形态数学模型的建立打下基础。Aiming at the problem of choosing the deformation model of the disperse phase droplet in shear flow field,which is very important to demulsification,the authentication for the basic droplet deformation model was proposed from the perspective of experimental for the first time.In order to make a further study on the droplet coalescence mechanism in a shear flow,the shear experiment device of the reverse rotating concentric barrels was improved,combined with digital image processing technology.Experimental results show that a three-dimensional mechanical deformation occurred on droplets in the shear flow.Experimental and theoretical studies on the rules of the deformation were implemented and the concept of non-affine degree of the droplet deformation was brought forward.Meanwhile,the surface stress distribution of deformed droplet in the shear flow was simulated and a more accurate description approach for the droplet deformation model was proposed,which set up the foundation for the precise mathematical model studying in the future.

关 键 词：乳化液 破乳机理 剪切流场 液滴形变三维模型 非仿射度 

分 类 号：TQ028.4[化学工程]