Collaborative Research: Fundamental Studies of Vapor-Liquid Interfaces with Phase Change in Microdevices

摘要提案编号：CTS-0245396、CTS-0244676提案类型：提案人发起（协作）主要提案人：乔治M.弗拉基米尔·霍姆斯AJAEVIN机构：U.C.圣巴巴拉，南方卫理公会大学合作研究：微器件中相变的汽液界面的基础研究该提案解决了受限几何条件下汽液界面蒸发和冷凝中流体力学和热传输的基本问题。结合理论/计算和实验研究的一系列现象提出，这将允许洞察到许多不同的应用，如微热管，微机电系统（MEMS），和光开关的共同的基本机制。这是UCSB的工程科学家和SMU的应用数学家之间的合作。两组密切相关的问题得到解决。第一个涉及的三维稳定的界面配置在复杂的几何形状，其中蒸发是平衡的冷凝在较冷的地区的研究。这里的挑战包括解决流体流动和传热耦合在一起的非线性自由边界问题。同时测量热通量、温度分布和汽泡结构的实验。第二组问题涉及约束界面的非定常运动。这项研究具有广泛的技术影响。这包括改进热管的设计，以有效地冷却电子元件，并为开发新型光开关设备奠定基础，这可能导致通信网络速度的大幅提高。该项目将通过研究和跨学科科学合作促进学习。研究生将获得宝贵的研究经验，并通过与PI和不同背景和观点的学生进行互动，将他们的知识扩展到他们的研究领域之外。在夏季的几个月里，作为有组织的UCSB计划的一部分，为未来的工程和科学专业的高中生提供外展服务。为了进一步提高该项目的教育价值，其结果将被纳入教育模块，作为多媒体流体力学第2卷的一部分，教育软件。该项目由化学和运输系统部门的流体动力学和水力学，界面运输和热力学以及热运输和热处理计划资助。

ABSTRACTPROPOSAL NO.: CTS-0245396, CTS-0244676PROPOSAL TYPE: INVESTIGATOR INITIATED (COLLABORATIVE)PRINCIPAL INVESTIGATORS: GEORGE M. HOMSY, VLADIMIR S. AJAEVINSTITUTION: U.C. SANTA BARBARA, SOUTHERN METHODIST UNIVERSITYCOLLABORATIVE RESEARCH: FUNDAMENTAL STUDIES OF VAPOR-LIQUID INTERFACES WITH PHASE CHANGE IN MICRODEVICESThe proposal addresses fundamental issues of fluid mechanics and heat transport in evaporation and condensation at vapor-liquid interfaces in constrained geometries. Combined theoretical/computational and experimental studies of a range of phenomena are proposed which will allow insight into the underlying mechanisms common to many different applications such as micro heat pipes, microelectromechanical systems (MEMS), and optical switches. This is a collaboration between engineering scientists at UCSB and applied mathematicians at SMU. Two closely related sets of problems are addressed. The first involves studies of three-dimensional steady interfacial configurations in complex geometries in which evaporation is balanced by condensation in the colder regions. Challenges here include solving nonlinear free-boundary problems where fluid flow and heat transfer are coupled together. Experiments in which simultaneous measurements of heat flux, temperature distributions, and vapor bubble configurations will be conducted. The second set of problems to be addressed involves unsteady motion of constrained interfaces. The proposed research has broad technological impact. This includes improvements in the design of heat pipes for effective cooling of electronic components, and underpinnings for the development of a new type of an optical switching device, which can lead to a dramatic increase in the speed of communication networks. The project will promote learning through research and interdisciplinary scientific collaborations. Graduate students will gain valuable research experience and expand their knowledge beyond their field of study by interacting with both PIs and with students of different backgrounds and perspectives. Outreach is provided to high school students during the summer months as part of the organized UCSB program for prospective engineering and science majors. To further increase the educational value of the project, the results will be incorporated into an educational module as part of Volume 2 of Multimedia Fluid Mechanics, educational software. This project is being funded by the Fluid Dynamics and Hydraulics, Interfacial Transport and Thermodynamics and Thermal Transport and Thermal Processing Programs in the Division of Chemical and Transport Systems.