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

多相材料的流动，如固体颗粒的悬浮液、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，从基础和实用的角度来看，这一主题都受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，多相流体动力学的研究活动尚未达到与该领域的重要性和复杂性相称的规模。例如，众所周知，单相材料的动力学可以用Navier-Stokes方程准确地描述，目前可以用各种解析或数值方法求解，但除了特殊情况外，目前还没有相应的多相材料基本方程。同样，与目前可用于单相流动的实验方法相比，缺乏能够捕获多相流动详细结构的实验方法。这次研讨会的目的是通过召集这个广泛领域的一个子集的一些关键研究人员，通过积极的讨论和思想交流，为组织协调一致的努力来解决一些需要解决的主要问题奠定基础，从而试图纠正这种情况。研讨会的主题是“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。本次会议由国际理论与应用力学联合会（IUTAM）主办，并由伊斯坦布尔技术大学共同主办。IUTAM是一个著名的国际组织，存在了大半个世纪。它每四年组织一次IUTAM大会，每年赞助大约十几个研讨会，这些研讨会都致力于力学的进步。本次专题研讨会由首席研究员与Can Delale教授（伊斯坦布尔技术大学）以及一个由6名成员组成的国际科学委员会共同组织。该提案寻求国家科学基金会的部分支持，以促进一些美国学生和其他研究人员的出席，否则他们将无法出席。会议将汇集一组人数不多但经过挑选的研究人员，他们活跃在多相流体动力学的基础领域，特别是涉及以下方面的发展：(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；(c)新的实验方法来测量这些流的详细结构，从而测试模型预测。潜在的应用包括涉及颗粒和其他多相流、悬浮流、混合、液滴破碎和凝聚、燃烧、电场和磁场驱动现象等的微纳米系统。与会者人数将限制在70-75人，以保持一个研讨会的气氛，在这个研讨会上，为了社区和国家科学基金会的利益，未来的研究方向将被确定。没有平行会议，但将有很多机会进行富有成果的讨论。所提议的活动的智力价值在于将该领域的3个社区聚集在一起，这些社区很少相互作用，即涉及：(a)为多相流建模开发合理的基本方程；(b)开发求解这些方程的模拟技术的人；(c)那些开发新的实验工具来详细测试理论预测的人。

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.