Experimental and numerical study of droplet motion and separation induced by aerodynamic and mechanical forces

空气动力和机械力引起的液滴运动和分离的实验和数值研究

• 批准号: 398314989
• 负责人: Professor Dr.-Ing. Uwe Janoske
• 金额: --
• 依托单位: Fachgebiet Strömungsmechanik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/398314989?language=en
• 关键词: Experimental; numerical; study; droplet; motion

The motion of droplets can be initiated in different ways such as shear flows, vibrational forces or gradient surfaces. Some of the influences can be superposed, whereupon some interactions are not investigated in detail. The current proposal introduces an experimental and numerical study for this purpose. This study covers droplet motion induced by mechanical vibrations and superposed shear flows. In this context a single as well as a two dimensional vibrational impact will be realized. The aim of the study is the determination of phase diagrams of the droplet motion as a function of droplet size, vibrational frequency and amplitude as well as the shear flow velocity. Furthermore, droplet separation due to the same experimental parameters will be investigated, too. Furthermore, numerical simulations with a Volume-of-Fluid model with additional models for the contact angle hysteresis will be made.

液滴的运动可以以不同的方式开始，如剪切流、振动力或梯度表面。有些影响可以叠加，因此一些相互作用没有详细研究。目前的建议介绍了为此目的的实验和数值研究。本研究涵盖了由机械振动和叠加剪切流引起的液滴运动。在这种情况下，将实现一维和二维振动冲击。研究的目的是确定液滴运动的相图作为液滴大小、振动频率和振幅以及剪切流速的函数。此外，还将研究相同实验参数下的液滴分离。此外，还将采用流体体积模型和附加的接触角迟滞模型进行数值模拟。

项目成果

Motion of adhering droplets induced by overlapping of gravitational and periodical acceleration

• DOI: 10.1016/j.ijmultiphaseflow.2020.103537
• 发表时间: 2021-02-01
• 期刊: INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
• 影响因子: 3.8
• 作者: Barwari, B.;Rohde, M.;Janoske, U.
• 通讯作者: Janoske, U.

Experimental study of the onset of downstream motion of adhering droplets in turbulent shear flows

• DOI: 10.1016/j.expthermflusci.2019.109843
• 发表时间: 2019-12
• 期刊: Experimental Thermal and Fluid Science
• 影响因子: 3.2
• 作者: Beawer Barwari;S. Burgmann;Artur Bechtold;M. Rohde;U. Janoske

Effects of fluid rheology and wetting properties on the droplet motion by a shear flow

流体流变学和润湿特性对剪切流液滴运动的影响

• DOI: 10.1002/pamm.201900068
• 发表时间: 2019
• 期刊: PAMM
• 作者: Barwari B;Burgmann S;Rohde M;Janoske U.
• 通讯作者: Janoske U.

Numerical analysis of an adhering droplet applying an adapted feedback deceleration technique

• DOI: 10.1016/j.ijmultiphaseflow.2021.103808
• 发表时间: 2021-08
• 期刊: International Journal of Multiphase Flow
• 影响因子: 3.8
• 作者: Veronika Krämer;Beawer Barwari;S. Burgmann;M. Rohde;Simon Rentschler;C. Holzknecht;C. Gmelin;U. Janoske