U.S. - Japan Seminar on Two-Phase Flow Dynamics, June 6-12, 2012, Tokyo, Japan

美国-日本两相流动力学研讨会，2012 年 6 月 6-12 日，日本东京

• 批准号: 1155673
• 负责人: Masahiro Kawaji
• 金额: $ 1.98万
• 依托单位: CUNY City College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1155673&HistoricalAwards=false
• 关键词: U.S.; Japan; Seminar; Two; Phase

PI: Masahiro Kawaji, City College of New YorkProposal Number: CBET-1155673Project SummaryThe proposed U.S.-Japan Seminar on Two-Phase Flow Dynamics will bring together young researchers and well established researchers from the two countries in the area of two-phase flow and heat transfer research. Multiphase flow and associated heat transfer occur in a wide variety of industrial processes and are of critical importance in energy generation and conversion systems, chemical reactors, oil recovery and refining systems, and nuclear reactor systems, among others. They are also important subjects to study in many engineering disciplines such as mechanical, chemical, petroleum, nuclear, aerospace, electrical, and environmental.Objective: The key objective of the seminars is to provide an opportunity for the participants to carry out in-depth discussions on the state of the art of the field, current challenges, and future directions for research on this important and pervasive phenomenon. The interactions amongst researchers from the two countries will lead to development of co-operative research programs beneficial to the advancement of the field and to pooling of intellectual resources of the two countries in charting the direction of future research. Topics to be considered at the seminars include multi-scale modeling and validation. A thorough discussion of these topics is essential as new tools are developed for simulation of multiphase flows.Intellectual Merit: The physics of multiphase flows is extremely complex and early investigations lead to formulation of empirical correlations. However, these correlations invariably did not fare well when applied to situations beyond the range of parameters over which the correlations had been developed. Subsequent efforts lead to mechanistic models which also relied on empirical constants to correlate the data. More recently advances have been made to numerically simulate the phenomena while solving conservation equations using appropriate boundary and interfacial conditions. These recent advances have increased confidence in extending the results validated with scaled systems to prototypes. Recent advances have also lead to formulation of models at nano, micro, and macroscale. However, scaling of the phenomena over several length scales is still not a resolved issue.In energy generation and conversion systems, the reduction of greenhouse gas emission is an urgent goal which can be achieved by developing alternative energy generation strategies that do not depend on fossil fuels. Nuclear energy is one such option and consequently is experiencing a renaissance, however, a recent accident at Fukushima Daiichi Nuclear Generating Station in Japan has highlighted a need to improve our understanding of coolant flow and heat transfer in complex flow channels inside a damaged reactor core and spent fuel bay.The uniqueness of the seminars is in the in-depth discussions that would take place among all the participants. Unlike other meetings and workshops where diverse topics are discussed, this seminar focuses on specific topics of current and future importance in multitudes of applications. The in-depth discussions amongst researchers of the two countries will lead to collaboration that will have lasting impact in advancing the field of two-phase flow and heat transfer. Junior researchers will be intellectually challenged and stimulated through interactions with nationally/internationally recognized senior and well respected members of the technical community.

PI：Masahiro Kawaji，纽约城市学院提案编号：CBET-1155673项目摘要拟议的美日两相流动力学研讨会将汇集两国在两相流和热领域的年轻研究人员和知名研究人员转移研究。多相流和相关的传热发生在各种工业过程中，并且在能源产生和转换系统、化学反应器、石油回收和精炼系统以及核反应堆系统等中至关重要。它们也是机械、化学、石油、核能、航空航天、电气和环境等许多工程学科的重要研究课题。 目的：研讨会的主要目的是为参与者提供深入开展研究的机会讨论该领域的最新技术、当前的挑战以及这一重要而普遍现象的研究未来方向。两国研究人员之间的互动将导致合作研究项目的发展，有利于该领域的进步，并汇集两国的智力资源来规划未来的研究方向。研讨会要考虑的主题包括多尺度建模和验证。随着用于多相流模拟的新工具的开发，对这些主题的彻底讨论至关重要。智力优点：多相流的物理学极其复杂，早期的研究导致了经验相关性的形成。然而，当应用于超出相关性开发参数范围的情况时，这些相关性总是表现不佳。随后的努力导致机械模型也依赖于经验常数来关联数据。最近，在使用适当的边界和界面条件求解守恒方程的同时，在数值模拟这些现象方面取得了进展。这些最新进展增强了将规模化系统验证的结果扩展到原型的信心。最近的进展还导致了纳米、微观和宏观模型的制定。然而，这种现象在几个长度尺度上的缩放仍然是一个没有解决的问题。在能源产生和转换系统中，减少温室气体排放是一个紧迫的目标，可以通过开发不依赖化石的替代能源产生策略来实现燃料。核能就是这样的选择之一，因此正在经历复兴，然而，日本福岛第一核电站最近发生的一次事故凸显出我们需要提高对受损反应堆堆芯内复杂流动通道中冷却剂流动和传热的了解，以及乏燃料舱。研讨会的独特之处在于所有参与者将进行深入的讨论。与讨论不同主题的其他会议和研讨会不同，本次研讨会侧重于众多应用中当前和未来重要性的特定主题。两国研究人员之间的深入讨论将带来合作，这将对两相流和传热领域的发展产生持久影响。初级研究人员将通过与国内/国际公认的高级且受人尊敬的技术社区成员的互动，在智力上受到挑战和激励。