Numerical Study of Transient Deformation and Drag Characteristics of a Decelerating Droplet

被引：10

作者：

Qu, Qiulin ^{[1
]}

Ma, Pingchang ^{[1
]}

Liu, Peiqing ^{[1
]}

Li, Shaowei ^{[2
]}

Agarwal, Ramesh K. ^{[3
]}

机构：

[1] Beijing Univ Aeronaut & Astronaut, Inst Fluid Mech, Beijing 100191, Peoples R China

[2] Beijing Inst Mech & Elect Engn, Beijing 100074, Peoples R China

[3] Washington Univ, Dept Mech & Mat Sci, St Louis, MO 63130 USA

来源：

AIAA JOURNAL | 2016年 / 54卷 / 02期

基金：

中国国家自然科学基金;

关键词：

INTERMEDIATE REYNOLDS-NUMBERS; AXISYMMETRICAL LIQUID-DROPS; SECONDARY BREAKUP; SHOCK-WAVE; MOTION; ACCELERATION; DISTURBANCES; FORCE;

D O I：

10.2514/1.J054286

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

A numerical study of the transient deformation and drag properties of impulsively started decelerating drops in axisymmetric flows is conducted. The incompressible Navier-Stokes equations coupled with the volume of fraction method are solved. The differences in the deformation and drag characteristics between the accelerating and decelerating drops are elucidated. The Weber number We has a significant influence on the drag properties of the round drops; however, the effect of the Ohnesorge number Oh is small. A dynamic droplet drag model is provided based on the computational fluid dynamics results to predict the drag coefficient of a decelerating drop. In addition, the flow of liquid drops past an RAE2822 airfoil is considered, and its drag is evaluated using the drag model.

引用

页码：490 / 505

页数：16

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