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首页 > 过刊浏览>2018年第41卷第12期 >1-9. DOI:10.11835/j.issn.1000-582X.2018.12.001
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假塑性流体液滴撞击壁面上的铺展的格子Boltzmann模拟
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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
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    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。

    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.

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周平,曾忠,乔龙.假塑性流体液滴撞击壁面上的铺展的格子Boltzmann模拟[J].重庆大学学报,2018,41(12):1-9.

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  • 收稿日期:2018-07-01
  • 在线发布日期: 2018-12-27
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