Support of IUTAM Symposium "Recent Advances in Multiphase Flows: Numerical & Experimental"

安德烈亚斯-AcrivosCTS-0613149 CUNY城市学院多相物质的流动，如固体颗粒的悬浮，液体中的液滴和气泡，在各种工业过程中以及在自然界中经常遇到，因此这个课题从基础和实践的角度都得到了相当程度的关注。然而，与更传统的单相流体力学领域相比，多相流体力学的研究活动还没有达到与该领域的重要性和复杂性相称的规模。例如，虽然众所周知，单相材料的动力学可以用Navier-Stokes方程精确地描述，目前可以用各种分析或数值技术来求解，但除了特殊情况外，目前还没有一套相应的多相材料的基本方程。同样，与现有的单相流实验方法相比，能够捕捉多相流详细结构的实验方法还很少。本次研讨会的目的是试图通过聚集这一广泛领域中的一些关键研究人员来纠正这种情况，并通过积极的讨论和思想交流，为组织一致努力解决一些需要解决的主要问题奠定基础。研讨会的标题是“多相流的最新进展：数值和实验”，将于2007年6月11日至14日在土耳其伊斯坦布尔举行。会议由国际理论与应用力学联盟(IUTAM)主办，伊斯坦布尔技术大学协办。IUTAM是一个著名的国际组织，已经存在了大半个世纪。它每4年组织一次IUTAM大会，每年赞助十几个左右的研讨会，所有这些都致力于机械技术的进步。这一专题讨论会是由首席研究员与can Delale教授(伊斯坦布尔技术大学)以及一个6人国际科学委员会共同组织的。这项建议寻求美国国家科学基金会的部分支持，以促进几名美国学生和其他研究人员的出席，否则他们将无法出席。会议将聚集一小群精选的研究人员，他们活跃在多相流体力学的基础上，特别是关于以下方面的发展：(A)描述此类系统的基本方程；(B)求解此类方程的通用数值技术；以及(C)测量此类流动的详细结构并由此检验模型预测的新颖实验方法。潜在的应用包括微米和纳米系统，涉及颗粒和其他多相流、悬浮流动、混合、液滴分解和合并、燃烧、电场和磁场驱动现象等。与会者人数将上限为70-75人，以维持研讨会氛围，以确定该学科领域的未来研究方向，以造福于整个社区，特别是国家科学基金会。将不会举行平行会议，但将有大量机会进行富有成效的讨论。拟议活动的智力价值在于将这一领域中很少互动的三个社区聚集在一起，即。包括：(A)开发用于模拟多相流的合理的基本方程；(B)开发用于求解这些方程的模拟技术；以及(C)开发用于详细检验理论预测的新的实验工具。

Andreas AcrivosCTS - 0613149CUNY City CollegeThe flow of multiphase materials, such as suspensions of solid particles, drops & bubbles inliquids, is encountered frequently in a variety of industrial processes as well as in nature, hencethe subject has received a considerable degree of attention from both the fundamental & practicalpoints of view. Yet, compared to the more traditional area of single-phase fluid mechanics, theresearch activity in multiphase fluid dynamics has not been on a scale commensurate with theimportance and complexity of the field. For example, although it is well known that the dynamicsof single -phase materials can be accurately described by means of the Navier-Stokes equations,which at present can be solved using a variety of analytical or numerical techniques, acorresponding set of fundamental equations for multiphase materials is currently unavailableexcept for special cases. Similarly, there is a dearth of experimental methods able to capture thedetailed structure of multiphase flows compared to those currently available for their single-phasecounterparts. It the purpose of this Symposium to try and remedy this situation by bringingtogether some of the key researchers in a subset of this broad field and, through active discussions& interchange of ideas, lay the foundations for organizing a concerted effort to attack some of themajor issues which need to be resolved.The Symposium is entitled "Recent Advances in Multiphase Flows: Numerical & Experimental"and will take place 11 14 June 2007, in Istanbul, Turkey. The meeting is under the auspices ofthe International Union on Theoretical & Applied Mechanics (IUTAM) and is co-sponsoredby the Istanbul Technical University. IUTAM, in existence for the better part of a century, is awell-known international organization. It organizes the IUTAM Congresses every 4 years andsponsors about a dozen or so Symposia every year all dedicated to the advancement ofmechanics. This particular Symposium is organized by the Principal Investigator, together withProfessor Can Delale (Istanbul Technical University), plus a 6 member international scientificcommittee. This proposal seeks partial support from the National Science Foundation in order tofacilitate the attendance of several American students and other researchers who would otherwisenot be able to attend.The meeting will bring together a small but select group of researchers active in the fundamentalsof multiphase fluid dynamics especially as concerns the development of: (a) fundamental basicequations for describing such systems; (b) general purpose numerical techniques for solving suchequations; and (c) novel experimental methods for measuring the detailed structure of such flowsand thereby testing the model predictions. Potential applications include micro- and nanosystemsinvolving particulate and other multiphase flows, suspension flows, mixing, drop break-up &coalescence, combustion, electric and magnetic field driven phenomena, etc.The number of attendees will be capped at 70-75 to maintain a workshop atmosphere wherefuture research directions in the subject field will be identified for the benefit of the community ingeneral and the National Science Foundation in particular. There will be no parallel sessions, butthere will be plenty of opportunities for fruitful discussions. The intellectual merit of theproposed activity lies in bringing together 3 communities in this field who seldom interact withone another, viz. those involved with: (a) developing rational fundamental equations for modelingmultiphase flows; (b) those developing simulation techniques for solving these equations; and (c)those developing novel experimental tools for testing in detail the theoretical predictions.