Investigation of Droplet Motion and Grouping
液滴运动和分组的研究
基本信息
- 批准号:409029509
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:
- 资助国家:德国
- 起止时间:
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
Sprays are used in a wide variety of technical systems. The use of sprays ranges from the combustion of fuels to the targeted coating of surfaces. The efficiency of these sprays is determined by the dynamic behavior of the droplets, which includes the tendency to form droplet groups. This grouping tendency has a significant effect on the evaporation and movement behavior of the entire spray, e.g. also on the distribution of the droplets during coating processes. The grouping of droplets has ramifications in energy and transport systems, in coating or in drug delivery (e.g. in inhalation systems). A better understanding of the phenomena that occur, thus, enables the group formation process to be controlled and thus to increase the efficiency of the systems, for example with regard to emission control, material savings, surface quality or drug distribution.This application for the second funding period continues the work done in the first funding period and expands on it. The individual detailed phenomena that occur are investigated theoretically, numerically and experimentally. The entire process of grouping can be described by three successive phases. First, the formation of groups is initiated and the droplets begin to approach each other, followed by the actual approach process, which finally ends with droplet coagulation. The formation of groups can be initiated, for example by the external flow field or by the droplet formation process. One aim of the investigations is to study possible processes of group formation, to identify methods for influencing and initializing the formation process and thus to specifically promote or avoid the coagulation of droplets. In the first funding period of the project, the approach processes of droplets within one and several droplet steams were already investigated experimentally, numerically and analytically. In the second funding period, which we are applying for, the investigations are to be extended to include a detailed investigation of the influences of droplet shape, droplet oscillations, the effect of an acoustic field and the drop evaporation on the droplet movement and the grouping behavior.The applying partners, BGU, Technion and ITLR, have different experimental, numerical and analytical methods at their disposal, which, when combined, allow to study all crucial sub-processes of droplet grouping in detail. Some methods overlap, thus allowing direct comparison and validation of the results. As in the first phase of the project, a very intensive cooperation between the partners is planned.
喷雾剂用于各种各样的技术系统。喷雾的使用范围从燃料的燃烧到表面的目标涂层。这些喷雾的效率取决于液滴的动态行为,包括形成液滴组的趋势。这种分组趋势对整个喷雾的蒸发和运动行为具有显著影响,例如也对涂覆过程期间液滴的分布具有显著影响。液滴的分组在能量和传输系统、涂层或药物递送(例如,在吸入系统中)中具有分支。因此,对所发生的现象的更好理解使得能够控制基团形成过程,从而提高系统的效率,例如关于排放控制、材料节省,表面质量或药物分布。第二个资助期的申请继续了第一个资助期的工作,并在此基础上进行了扩展。理论上,数值上和实验上。整个分组过程可以分为三个连续的阶段。首先,开始形成群体,液滴开始相互接近,然后是实际的接近过程,最后以液滴凝结结束。基团的形成可以例如通过外部流场或通过液滴形成过程来启动。研究的一个目的是研究可能的成组过程,以确定影响和初始化形成过程的方法,从而具体地促进或避免液滴的凝结。在该项目的第一个资助期内,已经通过实验、数值和分析研究了一个和多个液滴流中液滴的接近过程。在我们正在申请的第二个资助期内,研究将扩展到包括液滴形状、液滴振荡、声场效应和液滴蒸发对液滴运动和聚集行为的影响的详细研究。申请合作伙伴BGU、Technion和ITLR拥有不同的实验、数值和分析方法,当它们结合在一起时,允许详细研究液滴分组的所有关键子过程。有些方法是重叠的,因此可以直接比较和验证结果。与项目第一阶段一样,计划在合作伙伴之间开展非常密集的合作。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Professor Dr.-Ing. Bernhard Weigand其他文献
Professor Dr.-Ing. Bernhard Weigand的其他文献
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{{ truncateString('Professor Dr.-Ing. Bernhard Weigand', 18)}}的其他基金
Fundamental Investigations on Sability and Structure of Flow and Heat Transfer in Cyclone Cooling Chambers
旋风冷却室流动与传热的稳定性和结构的基础研究
- 批准号:
193145365 - 财政年份:2011
- 资助金额:
-- - 项目类别:
Research Grants
Investigation on the Influence of the Velocity Distribution and the Turbulent Fluctuations at the Nozzle Exit on the Liquid Jet Breakup with Direct Numerical Simulation of Multiphase Flows
多相流直接数值模拟研究喷嘴出口速度分布和湍流脉动对液体射流破碎的影响
- 批准号:
197550856 - 财政年份:2011
- 资助金额:
-- - 项目类别:
Priority Programmes
Experimentelle und numerische Untersuchungen zur Tropfen-Film-Interaktion
滴膜相互作用的实验和数值研究
- 批准号:
190433411 - 财政年份:2011
- 资助金额:
-- - 项目类别:
Research Grants
Heat Transfer in 3D-Vane-Passages - Systematic Generation and Investigation of Contoured Vane-Endwall Geometries for Turbomachines Using the Ice Formation Method
3D 叶片通道中的传热 - 使用冰形成方法系统生成和研究涡轮机的轮廓叶片端壁几何形状
- 批准号:
174475364 - 财政年份:2010
- 资助金额:
-- - 项目类别:
Research Grants
"Eis-Formations"-Methode - Optimierung von Turbomaschinenkomponenten
“结冰”方法——涡轮机械部件的优化
- 批准号:
5442917 - 财政年份:2005
- 资助金额:
-- - 项目类别:
Research Grants
Numerische Untersuchungen zum Wärmeübergang bei komplexen Innenströmungen mit wirbelerzeugenden Elementen
涡流发生元件复杂内部流动传热的数值研究
- 批准号:
21767636 - 财政年份:2005
- 资助金额:
-- - 项目类别:
Research Grants
Numerical investigations on heat transfer in complex internal flows with vortex generators
利用涡流发生器对复杂内部流动中的传热进行数值研究
- 批准号:
5407142 - 财政年份:2003
- 资助金额:
-- - 项目类别:
Research Grants
Numerical calculation of three-dimensional transport phenomena of deformed droplets, small droplet groups, and liquid ligaments in a fluid flow
流体流动中变形液滴、小液滴群和液韧带三维输运现象的数值计算
- 批准号:
5243436 - 财政年份:2000
- 资助金额:
-- - 项目类别:
Priority Programmes
Experimental and numerical investigation of the flow and heat transfer in conical Swirl Cooling Chambers
锥形涡流冷却室中流动和传热的实验和数值研究
- 批准号:
363548659 - 财政年份:
- 资助金额:
-- - 项目类别:
Research Grants
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BRIGE: Computational Studies of Droplet Motion in Digital Microfluidics
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0828469 - 财政年份:2009
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Mathematical analysis of the droplet motion and the particle motion with the chemical reaction.
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