Dynamics of three ferrofluid droplets in a rotating magnetic field  

作　　者：Xinping ZHOU Wencai XIAO Qi ZHANG Chunyue LIANG Wanqiu ZHANG Fei ZHANG 

机构地区：[1]School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China [2]State Key Laboratory of Intelligent Manufacturing Equipment and Technology,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2025年第3期591-600,共10页应用数学和力学(英文版)

基　　金：Project supported by the National Natural Science Foundation of China(No.12372263)。

摘　　要：Two-dimensional(2D)direct numerical simulations on the dynamics of three identical ferrofluid droplets suspended in a non-magnetic ambient fluid under a rotating uniform magnetic field are conducted,and the motion and deformation of the three ferrofluid droplets are studied in this paper.Results show that there are four modes(i.e.,the three droplets'direct coalescence(TC),the coalescence of two droplets and the subsequent planetary motion with the third droplet(CAP),the three droplets'planetary motion(TP),and the independent spin(IS))for the three ferrofluid droplets,dependent on the magnetic Bond number(Bom)and the initial distance(d0)between two of the droplets.It is found that the decrease in d0and the increase in Bomcan make the droplets'mode change from the IS to the planetary motion,and then turn to the CAP.Furthermore,reducing Bomor d0is helpful for the droplets to become merged.

关 键 词：ferrofluid droplet rotating magnetic field capillary force 

分 类 号：O361.3[理学—流体力学]