非均质壁面对液滴俘获能力的数值模拟研究

doi:10.13700/j.bh.1001-5965.2017.0799

北京航空航天大学学报 ›› 2018, Vol. 44 ›› Issue (10): 2021-2027.doi: 10.13700/j.bh.1001-5965.2017.0799

非均质壁面对液滴俘获能力的数值模拟研究

张莹¹, 卢敏¹, 李培生^1,2, 许术方¹, 刘强¹, 黄杰¹

1. 南昌大学机电工程学院, 南昌 330031;
2. 上饶师范学院江西省塑料制备成型重点实验室, 上饶 334001

收稿日期:2017-12-25 修回日期:2018-03-23 出版日期:2018-10-20 发布日期:2018-10-29
通讯作者: 李培生,E-mail:ncudns1995z@163.com E-mail:ncudns1995z@163.com
作者简介:张莹,女,博士,教授,博士生导师。主要研究方向:复杂热流体数值模拟;李培生,男,博士,教授,博士生导师。主要研究方向:固体废物、生物质、煤的清洁燃烧及资源化利用。
基金资助:
国家自然科学基金（11562011，51566012）；江西省研究生创新专项资金（YC2018-S059）

Numerical simulation of drop capturing capabilities on heterogeneous walls

ZHANG Ying¹, LU Min¹, LI Peisheng^1,2, XU Shufang¹, LIU Qiang¹, HUANG Jie¹

1. School of Mechanical & Electrical Engineering, Nanchang University, Nanchang 330031, China;
2. Jiangxi Province Key Laboratory of Polymer Preparation and Processing, Shangrao Normal College, Shangrao 334001, China

Received:2017-12-25 Revised:2018-03-23 Online:2018-10-20 Published:2018-10-29

摘要/Abstract

摘要： 为研究不同非均质壁面对液滴的俘获能力，采用界面追踪法（FTM）结合广义滑移边界建立了接触角模型，对液滴在非均匀润湿的非均质壁面上的运动过程进行了数值模拟研究。液滴在倾斜壁面上受到重力作用由均匀润湿部分下滑至非均匀润湿部分，通过改变Bo数、Oh数、非均匀润湿程度研究了液滴在非均匀润湿区域的运动规律。研究表明：Bo数越大，液滴运动受壁面阻力影响越小，液滴下滑的速度越快，液滴越难以被俘获；Oh数越大，液滴运动受壁面阻力影响越小，液滴越难以被俘获；非均匀润湿程度越大，非均质壁面对液滴的阻力越大，液滴越易被俘获。

关键词: 液滴, 直接数值模拟, 黏滑运动, 接触角, 界面追踪法(FTM)

Abstract: In order to study the drop capturing capabilities of heterogeneous walls, a numerical method is developed by integrating the generalized Navier boundary condition into front tracking method (FTM) to establish the contact angle model. The numerical simulation of the movement of drops on the heterogeneous wall with non-uniform wetting was carried out. The drop slides on the inclined wall from the uniform wetting part to the non-uniform wetting part. The movement of the drop in the non-uniform wetting area is studied by changing the Bo number, the Oh number and the non-uniform wetting degree. the results show that when the Bo number becomes lager, the movement of drop will be less affected by the resistance of the wall and the velocity of the drop will become larger which makes it difficult to be captured; the greater the Oh number is, the less effect of wall surface resistance on the drop is, and the more difficult it is to capture the drop; when the non-uniform wetting degree becomes lager, the resistance of the heterogeneous wall to drop will be greater, and the drop will be captured more easily.

Key words: drop, direct numerical simulation, stick-slip, contact angle, front tracking method (FTM)

中图分类号:

O359.1

张莹, 卢敏, 李培生, 许术方, 刘强, 黄杰. 非均质壁面对液滴俘获能力的数值模拟研究[J]. 北京航空航天大学学报, 2018, 44(10): 2021-2027.

ZHANG Ying, LU Min, LI Peisheng, XU Shufang, LIU Qiang, HUANG Jie. Numerical simulation of drop capturing capabilities on heterogeneous walls[J]. JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2018, 44(10): 2021-2027.

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非均质壁面对液滴俘获能力的数值模拟研究

Numerical simulation of drop capturing capabilities on heterogeneous walls

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