Gas and Vapor Bubbles in Confined Spaces

[摘要]约翰霍普金斯大学的andrea Prosperetti， PI和合作PI将对密闭充满液体的空间（如小通道、半封闭腔室等）中的气体和蒸汽气泡动力学进行理论和实验研究。这项工作的动机在于气泡在微流体系统中的应用，如泵、阀、执行器等。气泡在这些应用中的强大潜力在于其固有的简单性、短时间尺度和高功率密度。除此之外，它们提供了无需机械运动部件的驱动和将声波转换为机械能的能力。将进行几个旨在突出这些系统的基本特性的实验，并将开发其模拟的数学/数值模型。提出的研究被认为是将一些经典的理解和方法转移到一个新的环境中的一个主要例子，在这个环境中，减少的长度尺度将在新的行为中表达出来。

AbstractCTS-9987765Andrea Prosperetti, Johns Hopkins UniversityThe PI and co-PI's will execute a theoretical and experimental study of the dynamics of gas and vapor bubbles in confined liquid-filled spaces such as small channels, semi-enclosed chambers, and others. The motivation for the work consists in the possible application of bubbles in microfluidic systems such as pumps, valves, actuators and others. The strong potential of bubbles for these applications consists in their intrinsic simplicity, short time scale, and high power density. Among others, they offer the advantage of actuation without mechanical moving parts and the ability to convert acoustic into mechanical energy. Several experiments designed to highlight the fundamental properties of such systems will be conducted and mathematical/numerical models for their simulation will be developed.The proposed investigation is considered to be a prime example of transferring somewhat classical understanding and approaches to a new environment where the reduced length scales will be expressed in new behaviors.