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1、上海理工大学学报第 40 卷第 3 期J. University of Shanghai for Science and TechnologyVol. 40 No. 3 2018文章编号:1007−6735(2018)03−0231−07DOI:10.13255/j.cnki.jusst.2018.03.005基于格子玻尔兹曼方法的二维T型微通道内液滴生成王昭君1,杨帆1,2,郭雪岩1,2(1. 上海理工大学能源与动力工程学院,上海 200093;2. 上海理工大学上海市动力工程多相流与传热重点实验室,上海 200093
2、)摘要:采用格子玻尔兹曼方法中的伪势模型,模拟了密度比近似相同且不互溶的两液相在T型微通道内产生不同形态的液滴,模拟结果与实验结果相吻合。分析了毛细数、两相流量比及两相的黏度比等因素对生成的液滴尺寸和间距的影响,模拟结果所得各种因素间的数值公式也与实验结果相差无几,连续相的毛细数和两相流量比对液滴的尺寸和间距的影响比较大,两相的黏度比对液滴的影响微小。关键词:两相流;T型微通道;液滴生成;伪势模型;格子玻尔兹曼中图分类号:O 35 文献标志码:ALatticeBoltzmannModelfortheGenerat
3、ionofDropletsinTwo-DimensionalT-JunctionMicrochannelWANGZhaojun1,YANGFan1,2,GUOXueyan1,2(1.SchoolofEnergyandPowerEngineering,UniversityofShanghaiforScienceandTechnology,Shanghai200093,China;2.ShanghaiKeyLaboratoryofMultiphaseFlowandHeatTransferforPowerEngineering,Unive
4、rsityofShanghaiforScienceandTechnology,Shanghai200093,China)Abstract:By using the pseudo-potential model based on lattice Boltzmann method, for the flow of twoliquid phases with similar densities, the formation of droplets of different shapes in the T-junctionmicrochan
5、nel was simulated. The simulation results are consistent with the experimental results. Theeffects of the capillary number, flow ratio and viscosity ratio on the size and spacing of droplets wereanalyzed, and the numerical formulas summarized from the simulation result
6、s for considering theinfluence of various factors were also provided, whose results are also close to the experimental ones.The influences of the continuous phase capillary number and two-phase flow ratio are relatively great,while the viscosity ratio of two-phases has
7、 little influence on it.Keywords:two-phaseflow;T-junctionmicrochannel;dropletgeneration;pseudo-potentialmodel;latticeBoltzmann收稿日期:2017−09−27基金项目:上海市科委科研计划项目(13DZ2260900)第一作者:王昭君(1998–),男,硕士研究生.研究方向:计算流体力学.E-mail:jun2813@163.com通信作者:杨 帆(1974–),男,副教授.研究方向:计算流体力学.E-mail:
8、usstyf@163.com232上海理工大学学报2018 年第 40 卷微流控技术兴起于20世纪80年代,是一种对生的前提,连续相的毛细数、两相流量比则与液微尺度下多相流进行精确操控的技术。自从瑞士滴尺寸呈明显的函数关系,为主要的影