Investigations on the Droplet Impact onto a Spherical Surface with a High Density Ratio Multi-Relaxation Time Lattice-Boltzmann Model  

作　　者：Duo Zhang K.Papadikis Sai Gu 

机构地区：[1]Xi’an Jiaotong-Liverpool University,No.111 Ren’ai Road,Suzhou Dushu Lake Higher Education Town,Suzhou,China 215123. [2]School of Engineering,University of Liverpool,Brownlow Hill,Liverpool,L697ZX,United Kingdom [3]School of Engineering,Cranfield University,Bedfordshire MK430AL,United Kingdom.

出　　处：《Communications in Computational Physics》2014年第9期892-912,共21页计算物理通讯（英文）

基　　金：the financial support for this work by the UK Engineering and Physical Sciences Research Council(EPSRC)project grant:EP/K036548/1 and the EU FP7 IPACTS(268696)and iComFluid Projects(312261).

摘　　要：In the current study,a two-dimensional multi-relaxation time(MRT)lattice Boltzmann model which can tolerate high density ratios and low viscosity is employed to simulate the liquid droplet impact onto a curved target.The temporal variation of the film thickness at the north pole of the target surface is investigated.Three different temporal phases of the dynamics behavior,namely,the initial drop deformation phase,the inertia dominated phase and the viscosity dominated phase are reproduced and studied.The effect of the Reynolds number,Weber number and Galilei number on the film flow dynamics is investigated.In addition,the dynamic behavior of the droplet impact onto the side of the curved target is shown,and the effect of the contact angle,the Reynolds number and the Weber number are investigated.

关 键 词：Multiphase flow MRT Lattice Boltzmann high-density-ratio droplet impact film thickness dynamic behavior. 

分 类 号：O35[理学—流体力学]