Turbulent Drag Reduction in Polymer Solutions: Studies of the Interaction of Viscoelasticity and Exact Coherent States
聚合物溶液中的湍流减阻:粘弹性和精确相干态相互作用的研究
基本信息
- 批准号:0328325
- 负责人:
- 金额:--
- 依托单位:
- 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:2004-04-01 至 2008-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
ABSTRACTPROPOSAL NO.: CTS-0328325PRINCIPAL INVESTIGATORS: MICHAEL D. GRAHAMINSTITUTION: UNIVERSITY OF WISCONSINTURBULENT DRAG REDUCTION IN POLYMER SOLUTIONS: STUDIES OF THE INTERACTION OF VISCOELASTICITY AND EXACT COHERENT STATESThe energy required to rapidly pump a liquid can be dramatically reduced by addition of a small quantity of very large polymer molecules. This "rheological drag reduction" phenomenon has found widespread application in reduction of energy losses in pipelines, has spurred research into reducing drag over ships and has recently gained attention for its potential to dramatically improve efficiency of so-called district heating and cooling systems, in which chilled or heated water is generated at a central location and pumped to buildings in the surrounding area. Despite its widespread current and potential applications, however, the fundamental mechanisms underlying this phenomenon remain unclear. This study builds on the recent discovery of "exact coherent states" -- traveling wave flow patterns that underlie the organized fluid motions of turbulence near solid surfaces. These organized motions, or "coherent structures" are closely associated with the energy consumed by the flow, so the exact coherent states provide a natural starting point for better understanding rheological drag reduction. Using computations with molecularly based mathematical models of the flow of polymer solutions, the effect of polymer on these states will be elucidated and compared with those observed experimentally. Of particular interest is the origin of the so-called "maximum drag reduction asymptote", the experimentally observed upper limit on the amount of drag reduction that can be achieved with polymer additives. This study will provide educational opportunities at a number of levels. The graduate students involved will gain a unique multidisciplinary perspective, combining polymer physics, rheology, fluid dynamics and nonlinear dynamics. Undergraduate students will participate in a project involving practical issues of implementing drag-reducing fluids in a large-scale flow system. The knowledge gained under this study will lead to principles for rational design of both fluids and flow systems to best take advantage of drag-reducing additives. More broadly, the study will enable development of energy saving flow control strategies by contributing to a firm understanding of the coherent structures of turbulence.
摘要提案编号: CTS-0328325主要制造商:Michael D.格雷厄姆研究所: 威斯康星大学聚合物溶液中的湍流减阻:粘弹性和精确相干态相互作用的研究通过加入少量非常大的聚合物分子,可以显著降低快速泵送液体所需的能量。 这种“流变减阻”现象在减少管道中的能量损失方面得到了广泛的应用,促进了对减少船舶阻力的研究,并且最近因其显著提高所谓的区域加热和冷却系统的效率的潜力而受到关注,在区域加热和冷却系统中,在中心位置产生冷却或加热的水,并将其泵送到周围区域的建筑物。 尽管其广泛的当前和潜在的应用,但是,这一现象背后的基本机制仍然不清楚。 这项研究建立在最近发现的“精确相干态”-行波流动模式的基础上,有组织的流体运动的湍流附近的固体表面。这些有组织的运动或“相干结构”与流体消耗的能量密切相关,因此精确的相干态为更好地理解流变减阻提供了一个自然的起点。 使用基于分子的数学模型的聚合物溶液的流动的计算,这些状态的聚合物的效果将被阐明,并与实验观察到的。 特别感兴趣的是所谓的“最大减阻渐近线”的起源,实验观察到的聚合物添加剂可以实现的减阻量的上限。 这项研究将提供各级教育机会。 参与的研究生将获得独特的多学科视角,结合聚合物物理学,流变学,流体动力学和非线性动力学。 本科生将参加一个涉及在大规模流动系统中实施减阻流体的实际问题的项目。 根据这项研究获得的知识将导致合理设计的流体和流动系统的原则,以最好地利用减阻添加剂。 更广泛地说,这项研究将通过对湍流相干结构的深入理解,促进节能流动控制策略的发展。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Michael Graham其他文献
Poster 74 Non-Infarcted Brain Volume Predicts CI Therapy Outcomes in Chronic Stroke
- DOI:
10.1016/j.apmr.2011.07.099 - 发表时间:
2011-10-01 - 期刊:
- 影响因子:
- 作者:
Tyler Rickards;Victor Mark;Edward Taub;Chelsey Sterling;Gitendra Uswatte;Ameen Barghi;Michael Graham - 通讯作者:
Michael Graham
FDI, industrialisation and environmental quality in SSA—the role of institutional quality towards environmental sustainability
外国直接投资、工业化与撒哈拉以南非洲的环境质量——制度质量对环境可持续性的作用
- DOI:
10.1057/s41599-024-04000-6 - 发表时间:
2024-11-06 - 期刊:
- 影响因子:3.600
- 作者:
John Abdulai Jinapor;Joshua Yindenaba Abor;Michael Graham - 通讯作者:
Michael Graham
Poster 75 Corpus Callosum Size Predicts Paretic Arm Spontaneous Use and Maximal Movement Ability in Chronic Stroke
- DOI:
10.1016/j.apmr.2011.07.100 - 发表时间:
2011-10-01 - 期刊:
- 影响因子:
- 作者:
Chelsey Sterling;Victor Mark;Edward Taub;Tyler Rickards;Gitendra Uswatte;Ameen Barghi;Michael Graham;Angela Chandler - 通讯作者:
Angela Chandler
The Discourse Function of Koine Greek Verb Forms in Narrative: Testing Current Proposals in the Book of Judith
叙事中通用希腊语动词形式的话语功能:检验《朱迪思之书》中当前的建议
- DOI:
- 发表时间:
2018 - 期刊:
- 影响因子:0
- 作者:
Michael Graham - 通讯作者:
Michael Graham
16: Transplantation Otcome of Plasma Depleted Cord Blood Unit and the Effect of Post-Thaw Washing
- DOI:
10.1016/j.bbmt.2006.08.018 - 发表时间:
2006-11-01 - 期刊:
- 影响因子:
- 作者:
Robert Chow;Auayporn Nademanee;Joseph Rosenthal;Chatchada Karanes;Tang-Her Jaing;Michael Graham;Brian Wang;David Gjertson;Lee Lee Chan;Gretchen Eames;Ah Moy Tan;Poh-Lin Tan;Hai-Peng Lin;Patrick Tan;Lawrence Petz - 通讯作者:
Lawrence Petz
Michael Graham的其他文献
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{{ truncateString('Michael Graham', 18)}}的其他基金
Collaborative Research: CDS&E: data-enabled dynamic microstructural modeling of flowing complex fluids
合作研究:CDS
- 批准号:
2347344 - 财政年份:2024
- 资助金额:
-- - 项目类别:
Standard Grant
Microcirculatory blood flow in sickle cell disease
镰状细胞病中的微循环血流
- 批准号:
2042221 - 财政年份:2020
- 资助金额:
-- - 项目类别:
Standard Grant
Rheology and fluid dynamics of surfactant solutions with flow-induced structure
具有流动诱导结构的表面活性剂溶液的流变学和流体动力学
- 批准号:
1803090 - 财政年份:2018
- 资助金额:
-- - 项目类别:
Standard Grant
Dynamics in thin sheets in flow: flipping, folding, bending and buckling
流动中薄板的动力学:翻转、折叠、弯曲和屈曲
- 批准号:
1604767 - 财政年份:2016
- 资助金额:
-- - 项目类别:
Standard Grant
UNS: Origins of maximum drag reduction in viscoelastic turbulence
UNS:粘弹性湍流中最大减阻的起源
- 批准号:
1510291 - 财政年份:2015
- 资助金额:
-- - 项目类别:
Standard Grant
Cell distribution and segregation phenomena in blood flow: biomechanical aspects and impacts
血流中的细胞分布和分离现象:生物力学方面和影响
- 批准号:
1436082 - 财政年份:2014
- 资助金额:
-- - 项目类别:
Standard Grant
Dynamics of Multiflagellar Swimming in Bacteria
细菌中多鞭毛游动的动力学
- 批准号:
1304942 - 财政年份:2013
- 资助金额:
-- - 项目类别:
Standard Grant
Transport of cells and drug delivery particles in blood flow
血流中细胞和药物输送颗粒的运输
- 批准号:
1132579 - 财政年份:2011
- 资助金额:
-- - 项目类别:
Standard Grant
Drag reduction and the nonlinear dynamics of Newtonian and viscoelastic turbulence
减阻以及牛顿和粘弹性湍流的非线性动力学
- 批准号:
1066223 - 财政年份:2011
- 资助金额:
-- - 项目类别:
Standard Grant
Conference support: XVIth International Workshop on Numerical Methods for Non-Newtonian Flows, Northampton, MA
会议支持:第十六届非牛顿流数值方法国际研讨会,马萨诸塞州北安普顿
- 批准号:
1018988 - 财政年份:2010
- 资助金额:
-- - 项目类别:
Standard Grant
相似国自然基金
超稳定Drag-free卫星编队动力学建模与控制研究
- 批准号:11002040
- 批准年份:2010
- 资助金额:19.0 万元
- 项目类别:青年科学基金项目
相似海外基金
Study on turbulent drag reduction by longitudinal vortex suppression control using an acoustic streaming type flow field control device
声流式流场控制装置纵向涡抑制控制湍流减阻研究
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23H01629 - 财政年份:2023
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Innovative Drag Reduction Technology using 3-D Effect of Gas-Liquid Two-Phase Turbulent Boundary Layers
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21J11854 - 财政年份:2021
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2054894 - 财政年份:2021
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CBET-EPSRC: Surfactant impact on drag reduction of superhydrophobic surfaces in turbulent flows
CBET-EPSRC:表面活性剂对湍流中超疏水表面减阻的影响
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EP/T030739/1 - 财政年份:2021
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[EnAble]: Developing and Exploiting Intelligent Approaches for Turbulent Drag Reduction
[EnAble]:开发和利用减少湍流阻力的智能方法
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EP/T020946/1 - 财政年份:2021
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Smart control of gas-liquid two-phase turbulent boundary layers for frictional drag reduction
智能控制气液两相湍流边界层以减少摩擦阻力
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21H04538 - 财政年份:2021
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Relaminarization and maximum drag reduction in turbulent boundary layer flow due to high speed injection of surfactant solution
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