期刊信息
主管单位:国家教育部
主办单位:重庆大学
主  编:
地  址:重庆市沙坪坝正街174号
邮政编码:400030
电  话:023-65102302
电子邮件:xbsg@cqu.edu.cn
国际标准刊号:ISSN 1000-582X
国内统一刊号:CN 50-1044/N
邮发代号:国内78-16 国外 M355
引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ EndNote   BibTeX  过刊浏览    高级检索
本文已被:浏览 234次   下载 97 本文二维码信息
码上扫一扫!
分享到: 微信 更多
假塑性流体液滴撞击壁面上的铺展的格子Boltzmann模拟
周平, 曾忠, 乔龙
重庆大学 航空航天学院, 重庆 400044
摘要:
流体液滴在壁面上的铺展与沉积在工业应用中存在广泛应用,研究非牛顿流体特性对液滴铺展的影响具有重要的实际意义。基于相场法建立了非牛顿幂律流体与牛顿流体的两相流格子Boltzmann模型,引入包括接触角影响的边界条件,模拟了假塑性流体在幂律指数(n)0.5~1.0以及韦伯数(We)5~45时液滴撞击壁面的铺展过程。结果表明:相对于牛顿流体,幂律流体的非牛顿特性会抑制液滴的铺展,且n越小,越有利于液滴沉积。此外,韦伯数越大,液滴越快地达到稳定。
关键词:  格子Boltzmann方法  幂律液体  假塑性流体  相界面  相场法  液滴沉积  液滴铺展
DOI:10.11835/j.issn.1000-582X.2018.12.001
分类号:
基金项目:国家自然科学基金资助项目(11572062);长江学者和创新团队发展计划资助项目(IRT_17R112)。
Simulation of shear-thinning droplets impact on solid surfaces by using Lattice Boltzmann method
ZHOU Ping, ZENG Zhong, QIAO Long
College of Aerospace Engineering, Chongqing University, Chongqing 400044, P. R. China
Abstract:
The droplet spreading and deposition appear widely in industrial applications, and it is of practical significance to study the effect of non-Newtonian rheology on droplets impact on solid surfaces. In this research, we developed a two-phase lattice Boltzmann model based on the phase field method for power-law fluid flows. By introducing a contact angle condition, power-law droplets impact on solid surfaces was investigated, and the effects of power exponent n (0.5 ≤ n ≤ 1.0) and Weber number We (5 ≤ We ≤ 45) on shear-thinning droplets impact were evaluated. The results indicate that power-law liquid inhibits the droplet spreading and splashing, and it becomes easier for deposition with the decrease of n. In addition, droplets are easier to reach stationary state as weber number increases.
Key words:  Lattice Boltzmann method  power law liquid  pseudoplastic fluid  phase interfaces  phase field method  droplet deposition  droplet spreading
Copyright@ 2008 All Rights Reserved.