Interfacial Dynamics in Displacement Flows of Entangled Polymeric Fluids

国家科学基金会-化学运输系统分部颗粒多相过程计划（1415）提案编号：0651497主要研究者：Khomami，Bamin所属机构： 美国田纳西大学诺克斯维尔分校的建议题目：缠结聚合物流体驱替流动中的界面动力学智能优点驱替流动在广泛的多相流中无处不在，并且在许多领域具有巨大的实际应用，例如气体辅助注射成型、提高石油采收率、中空纤维膜的生产和基底的涂覆。拟议的工作将整合在聚合物物理学，粘弹性流体力学和计算科学的进展，开发的线性和支化的聚合物熔体的位移流的界面动力学的机械理解。拟议活动的智力优点包括：聚合物浓度和结构对原型空气-流体驱替流的界面动力学的影响的综合实验研究。直链和支链缠结聚合物溶液的原型气液驱替流的界面不稳定性的直接模拟。确定热效应的影响（即，粘性加热和流体的热敏性的耦合）对线性和支化缠结聚合物溶液的原型空气-流体驱替流的界面动力学的影响。拟议的研究将导致开发实验验证高保真工艺模拟工具的工业相关的过程-一个领域的计算工具是迫切需要合理化的商品和增值产品的净形状液态过程的设计和操作。当前和未来技术的成功及其改善我们生活质量的潜力在很大程度上取决于创造一支能够应对现代科学和工程挑战的劳动力队伍。我们的主要目标之一是开发一个教学系统，通过课堂和实验室的经验，培养研究生和本科生在计算材料科学与工程。在过去的十年中，美国各级教育的毕业生在这一领域明显落后于欧洲同行。因此，拟议的研究/教育计划是必要和及时的。多样性和外展：在田纳西大学，诺克斯维尔（UTK）的各种方案，例如，NSF支持的TLSAMP，管道工程多样性计划和GEM将用于确保非裔美国人，西班牙裔美国人，美国原住民和女学生参与这项研究。我们还将利用UTK广泛的外展基础设施，让K-12教师和高中学生参与研究计划。互联网传播：这项研究所产生的模拟模块、实验数据库、技术出版物和介绍将放在一个积极维护的网页上。中间件将用于模拟模块和数据可视化的基于网络的执行。工业互动：涂料行业充分认识到拟议研究的价值。设想与3 M公司密切合作，在工业环境中实施这项研究的结果。在EPSCoR州建立研究基础设施：该提案将有助于田纳西州可持续研究基础设施的进一步发展，包括（i）培训学生，（ii）在UT发展专业知识，以及（iii）加强UTK，斯坦福大学和丹麦技术大学之间的研究网络。

National Science Foundation - Division of Chemical &Transport Systems Particulate & Multiphase Processes Program (1415)Proposal Number: 0651497Principal Investigators: Khomami, BaminAffiliation: University of Tennessee, KnoxvilleProposal Title: Interfacial Dynamics in displacement Flows of Entangled Polymeric FluidsIntellectual MeritDisplacement flows are omnipresent in a broad class of multiphase flows and are of tremendous practical application in many fields such as gas assisted injected molding, enhanced oil recovery, production of hollow fiber membranes and coating of substrates. The proposed work will integrate advances in polymer physics, viscoelastic fluid mechanics and computational science to develop a mechanistic understanding of interfacial dynamics in displacement flows of linear and branched polymeric melts. The intellectual merits of the proposed activities include: Comprehensive experimental investigation of the influence of polymer concentration and architecture on the interfacial dynamics of prototypical air-fluid displacement flows. Direct simulation of the interfacial instability of prototypical air-fluid displacement flows of linear and branched entangled polymeric solutions. Determination of the influence of thermal effects (i.e., coupling of viscous heating and the thermal sensitivity of the fluid) on interfacial dynamics of prototypical air-fluid displacement flows of linear and branched entangled polymeric solutions. The proposed research will result in development of experimentally validated hi-fidelity process simulation tools for industrially relevant processes - a field where computational tools are desperately needed to rationalize the design and operation of net shape liquid state processes for commodity and value added products. Broader Impacts The success of present and future technologies and their potential to improve our quality of life depend largely on the creation of a workforce that is well equipped to tackle modern science and engineering challenges. One of our main objectives is to develop a system of instruction, through both classroom and laboratory experiences, for training graduate and undergraduate students in computational material science and engineering. In the past decade, U.S. graduates at all levels of education have significantly fallen behind their European counterparts in this area. Hence, the proposed research/educational program is essential and timely. Diversity and Outreach: Various programs at the University of Tennessee, Knoxville (UTK), e.g., NSF-supported TLSAMP, Pipeline Engineering Diversity Program and GEM will be used to ensure participation of African-American, Hispanic-American, Native-American and female students in this research. We will also utilize the extensive outreach infrastructure at UTK to involve K-12 teachers and high school students in the research program. Internet Based Dissemination: The simulation module, experimental database, technical publications and presentations stemming from this research will be placed on an actively maintained web page. Middleware will be used for web-based execution of the simulation module and data visualization. Industrial Interactions: The coating Industry fully recognizes the value of the proposed research. A close collaboration with 3M Corporation in implementation of the results of this research in an industrial setting is envisioned. Building Research Infrastructure in an EPSCoR State: This proposal will contribute to the further development of a sustainable research infrastructure in Tennessee, in terms of (i) training students, (ii) developing expertise at UT and (iii) strengthening the research network between UTK, Stanford and Danish Technical University.