U.S.-Germany Cooperative Research: Control of Bubble Formation, Breakup and Coalescence in Two-Phase Flow and Boiling Using Electric Fields

0129054赫尔曼该奖项支持西拉·赫尔曼和约翰霍普金斯大学的学生与德国汉诺威大学化学工程研究所的Dieter Mewes合作。该项目的重点将是利用电场影响气泡的形成以及在陆地和微重力条件下的沸腾。虽然德国和美国的调查人员在光学测量技术方面都有经验，但他们现在打算在气泡形成和运动的电流体控制这一新领域进行合作。这项新技术可能有可能实现对气泡形成的更好控制，并增加从表面转移的热量。了解电场作用下气泡破裂的机理，有助于控制两相流系统中气泡的大小，对相变流和两相流系统的合理设计有很大的帮助。该工作计划允许研究生广泛参与国际旅行和研究。

0129054HermanThis award supports Cila Herman and students from the Johns Hopkins University to collaborate with Dieter Mewes of the Institute for Chemical Engineering at the University of Hannover, Germany. The project will focus on the use of electric fields to influence bubble formation as well as boiling in terrestrial and microgravity conditions. While both the German and US investigators have experience in optical measurement techniques, they now intend to collaborate in the new area of electrohydrodynamic control of bubble formation and motion. The new technique may has potential for achieving better control over bubble formation and for increasing the amount of heat that can be transferred from a surface. An understanding of the mechanisms of bubble break-up under the influence of electric fields holds the promise of being able to control bubble size in two-phase flow systems and could have great benefits to the proper design of phase-change and two-phase flow systems. The work plan provides for extensive participation by graduate students in the international travel and research.