液滴在非均匀润湿表面上的动力行为

上海交通大学学报（自然版） ›› 2014, Vol. 48 ›› Issue (02): 239-244.

液滴在非均匀润湿表面上的动力行为

龚帅,郑平

(上海交通大学机械与动力工程学院，上海 200240)

收稿日期:2013-04-23
基金资助:
国家自然科学基金资助(51036005; 51276109),上海交通大学研究生创新能力培养基金，上海交通大学优秀博士学位论文培育基金资助

Droplet Dynamics on Surfaces with Non-Uniform Wettability

GONG Shuai,CHENG Ping

(School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)

Received:2013-04-23

摘要/Abstract

摘要：

用一种改进的格子Boltzmann方法(LBM)两相流模型模拟了三维液滴在非均匀润湿表面上的动力学行为.该模型在数值精度和稳定性上都有很大改善.在几种不同的非均匀润湿表面上，分析了液滴的铺展行为和运动过程.通过对液滴分裂过程中速度场的分析，阐明了液滴在润湿梯度作用下的运动和分裂机理.

关键词: 液滴, 格子Boltzmann方法, 润湿性, 接触角

Abstract:

Three-dimensional droplet dynamics on surfaces with non-uniform wettability were investigated based on an improved lattice Boltzmann method (LBM) for multiphase flows. Both the accuracy and numerical stability were improved in this model. Droplet spreading and movement on surfaces with non-uniform wettability was analyzed. The mechanism of droplet movement and splitting under the action of wettability gradient was illustrated based on the analysis of velocity field during the droplet splitting process.

Key words: droplet, lattice Boltzmann method（LBM）, wettability, contact angle

中图分类号:

O 359

龚帅,郑平. 液滴在非均匀润湿表面上的动力行为[J]. 上海交通大学学报（自然版）, 2014, 48(02): 239-244.

GONG Shuai,CHENG Ping. Droplet Dynamics on Surfaces with Non-Uniform Wettability[J]. Journal of Shanghai Jiaotong University, 2014, 48(02): 239-244.

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