Collaborative Research: Flow Transitions and Turbulence in the Taylor-Couette Flow of Dilute Polymer Solutions

合作研究：稀聚合物溶液泰勒-库埃特流动中的流动转变和湍流

• 批准号: 0335348
• 负责人: Radhakrishna Sureshkumar
• 金额: $ 20万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-01 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0335348&HistoricalAwards=false
• 关键词: Collaborative; Research; Flow; Transitions; Turbulence

ABSTRACTPROPOSAL NO.: CTS-0335169, CTS-0335348PRINCIPAL INVESTIGATORS: SUSAN MULLER, R. SURESHKUMARINSTITUTION: UNIVERSITY OF CAL - BERKELEY, WASHINGTON UNIVERSITYFLOW TRANSITIONS AND TURBULENCE IN THE TAYLOR-COUETTE FLOW OF DILUTE POLYMER SOLUTIONSThis is a study of polymer-induced effects on flow transitions, turbulence, and drag reduction in curvilinear flows. Under this grant, a combined experimental and numerical modeling approach will be undertaken to provide complementary information and allow direct, quantitative comparisons of experiments and direct numerical simulation results. This will yield faithful modeling and simulation tools to describe the interaction between polymer chains and nonlinear flow states, guidance regarding important parameter ranges to study, insight into the types of flow structures and polymer chain architectures important in drag reduction, and provide quantitative information about the mechanisms of polymer-induced turbulent drag reduction. This study will advance understanding of friction control in large scale fluid transportation systems and guide the development of polymeric additives that will lead to drag reduction. In addition, the knowledge of how polymers induce qualitative and quantitative changes in fluid flow and drag will help develop polymer-mimetic technologies for designing energy-efficient mixing devices and drag reduction systems for ships and submarines that could result in enormous savings in fuel costs. In addition to the potential for energy savings, broader impacts in the areas of processing of macromolecules in microfluidic devices and in the optimization of conventional polymer mixing and processing operations are also anticipated. In addition, the PI's will develop an undergraduate transport laboratory module and website based on Taylor-Couette flow. The website, in addition to summarizing the research results, will include flow visualization movies aimed at introducing basic ideas of flow stability, turbulence, and the effects of polymers on flow to high school and undergraduate students.

摘要提案编号：CTS-0335169、CTS-0335348 主要研究员：SUSAN MULLER、R. SURESHKUMAR 机构：加州大学伯克利分校、华盛顿大学 稀聚合物泰勒-库埃特流动中的流动转变和湍流解决方案这是一项研究聚合物对曲线流中的流动转变、湍流和减阻的影响。 在这笔资助下，将采用实验和数值模拟相结合的方法来提供补充信息，并允许对实验和直接数值模拟结果进行直接、定量的比较。 这将产生忠实的建模和模拟工具来描述聚合物链和非线性流动状态之间的相互作用，提供有关要研究的重要参数范围的指导，深入了解减阻中重要的流动结构和聚合物链结构的类型，并提供有关聚合物链和非线性流动状态的定量信息。聚合物诱导的湍流减阻机制。 这项研究将增进对大规模流体输送系统中摩擦控制的理解，并指导聚合物添加剂的开发，从而减少阻力。此外，了解聚合物如何引起流体流动和阻力的定性和定量变化将有助于开发聚合物模拟技术，用于设计船舶和潜艇的节能混合装置和减阻系统，从而大大节省燃料成本。 除了节能潜力之外，预计还会对微流体装置中的大分子加工领域以及传统聚合物混合和加工操作的优化产生更广泛的影响。此外，PI 将开发一个基于 Taylor-Couette 流的本科运输实验室模块和网站。 该网站除了总结研究成果外，还将包括流动可视化电影，旨在向高中生和本科生介绍流动稳定性、湍流以及聚合物对流动的影响的基本思想。