重力对微圆管中H2SO4/正己烷体系流动特性影响的数值模拟  

Numerical Simulation of the Effect of Gravity on Flow Characteristics of H2SO4/n-Hexane System in Microtube

作　　者：陈超[1] 刘义 郑幼松[2] Chen Chao;Liu Yi;Zheng Yousong(Sichuan Base of International Science and Technology Cooperation for Green Chemical Industry,School of Chemical Engineering,Sichuan University,Chengdu 610065,Sichuan,China;Sichuan Vocational College of Chemical Technology,Luzhou 646005,Sichuan,China)

机构地区：[1]四川大学化学工程学院,四川省绿色化工国际科技合作基地,四川成都610065 [2]四川化工职业技术学院,四川泸州646005

出　　处：《四川化工》2020年第4期27-31,共5页Sichuan Chemical Industry

基　　金：国家自然科学基金(21576168)。

摘　　要：采用VOF模型对U型微圆管中H2SO4/正己烷两相的流动特性受重力的影响进行了三维数值模拟。比较了U型微圆管中的竖直向上、竖直向下和水平方向的液滴的流动形态。结果表明重力会改变液滴的尺寸和界面形态,竖直向上运动时液滴的尺寸最大。分析了该通道中的压力分布,结果表明竖直向上流动时压降最大,水平次之,竖直向下最小。分析了通道中流体的内部流场,发现重力会改变通道中流体内部的流场分布,但并不会引起流体宏观运动速度的明显改变。Effect of gravity on the flow characteristics of H2SO4/n-hexane two phases in U-shaped microtube was studied by Computational Fluid Dynamics(CFD)with the Volume of Fluid(VOF)method.Comparing the flow patterns of the curved channels,vertical upward,vertical downward and horizontal directions in the U-shaped microtube.The results show that gravity changes the size and interface shape of the droplet,and the droplet size is the largest when moving vertically upward.The pressure distribution in the channel is analyzed.The results show that the pressure drop is the largest when flowing vertically upward,followed by horizontal,and the smallest vertically downward.The internal flow field of the fluid in the channel is analyzed.It can be found that gravity would change the distribution of the flow field inside the fluid in the channel,but it would not cause the obvious change of the macroscopic velocity of the fluid.

关 键 词：微圆管 重力 流动特性 H2SO4 正己烷 

分 类 号：G63[文化科学—教育学]