Filmbildung auf festen Oberflächen beim Aufprall von Tropfen

跌落冲击时在固体表面形成薄膜

• 批准号: 5107440
• 负责人: Professor Dr.-Ing. Cameron Tropea
• 金额: --
• 依托单位: Fachgebiet Strömungslehre und Aerodynamik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 1998
• 资助国家: 德国
• 起止时间: 1997-12-31 至 2003-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5107440?language=en
• 关键词: Filmbildung; auf; festen; Oberfl; chen

The project will continue the study of the first two years. Additional fluids will be used in order to extend the parameter range of the impact process. Special experiments are planned with liquid helium. For this case, the influence of viscosity can be neglected. The global aim is still the identification of the most important parameters, which have influence on the impact of drops on solid surfaces. The wettability and wall roughness, respectively wall structure, are of special interest in this connection. Compared to the former proposal, the working program has been extended to numerical simulations on basis of direct solving of the Navier-Stokes equations. Previous made simulations look promising. However, the use of dynamic border angle is still open for improvement, which is one of the aims of this project.

该项目将继续前两年的研究。为了扩大冲击过程的参数范围，将使用额外的流体。计划用液氦进行特殊实验。在这种情况下，粘度的影响可以忽略不计。全球的目标仍然是最重要的参数，这对固体表面上的液滴的影响的识别。润湿性和壁粗糙度，分别壁结构，在这方面是特别感兴趣的。与前一方案相比，该工作程序在直接求解Navier-Stokes方程的基础上扩展到数值模拟。以前的模拟看起来很有希望。然而，动态边界角的使用仍然有待改进，这是本项目的目标之一。