A numerical study of droplet dynamic behaviors on a micro-structured surface using a three dimensional color-gradient lattice Boltzmann model,Soft Matter

当前位置： X-MOL 学术 › Soft Matter › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

A numerical study of droplet dynamic behaviors on a micro-structured surface using a three dimensional color-gradient lattice Boltzmann model
Soft Matter ( IF 2.9 ) Pub Date : 2017-12-18 00:00:00 , DOI: 10.1039/c7sm02078c
Zihao Cheng _{1,

2,

3,

4} , Yan Ba _{4,

5,

6,

7} , Jinju Sun _{1,

2,

3,

4,

8} , Chao Wang _{1,

2,

3,

4} , Shengchuan Cai _{1,

2,

3,

4} , Xiaojin Fu _{1,

2,

3,

4}

Affiliation

Inspired by the experimental work of Raj et al. (high-resolution liquid patterns via three-dimensional droplet shape control), in the present study, a three-dimensional multiphase color-gradient lattice Boltzmann model developed previously by some of the authors is used to simulate droplet dynamic behaviors with different surface micro-pillar arrays. To facilitate the present simulation, wetting boundary conditions are used and the accuracy of color gradient prediction at boundary nodes is enhanced. The experimental findings are confirmed and non-circular contact lines are reproduced numerically for the first time. To justify the existing contact angle formula proposed based on the Wenzel model, a systematic parametric study is conducted, based on which the pillar density is redefined to allow for the influence of pillar height, and then it is used to modify the contact angle. In addition, the evolution of the contact line motion for various droplet shapes is investigated systematically, and both circular and non-circular contact characteristics are well-depicted for different surface micro-pillar arrays.

中文翻译：

使用三维颜色梯度格子Boltzmann模型对微结构表面上的液滴动态行为进行数值研究

受Raj等人实验工作的启发。（通过三维液滴形状控制），在本研究中，一些作者先前开发的三维多相颜色梯度格子Boltzmann模型用于模拟具有不同表面微柱阵列的液滴动力学行为。为了促进当前的仿真，使用了润湿边界条件，并且增强了边界节点处的颜色梯度预测的准确性。实验结果得到证实，非圆形接触线首次通过数值复制。为了证明基于Wenzel模型提出的现有接触角公式的合理性，进行了系统的参数研究，在此基础上重新定义了支柱密度以考虑支柱高度的影响，然后将其用于修改接触角。此外，

更新日期：2017-12-18

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11