RUI: Granular Friction, Fluid Mixing and Related Nonlinear Phenomena
RUI:颗粒摩擦、流体混合及相关非线性现象
基本信息
- 批准号:9704301
- 负责人:
- 金额:$ 29.7万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:1997
- 资助国家:美国
- 起止时间:1997-07-15 至 2000-10-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
9704301 Gollub This is a renewal project which will extend our understanding of nonlinear physical phenomena, especially those involving granular materials and fluids, using small scale laboratory experiments and involving undergraduate students. An extensive study will be made of the phenomena of shear friction in granular layers. Delicate shear force measurements will be combined with simultaneous microscopic imaging. These improvements will allow the onset of stick- slip motion, precursors, and the transition to continuous slipping to be investigated in detail. One goal is to compare and contrast granular friction with solid-solid friction. A second focus will be the study of fluid mixing phenomena, in which a passive impurity is mixed by a flow. These experiments will include investigations of chaotic advection in random cellular flows, and transport in granular media. Finally, continuing experiments on pattern formation and dynamics of nonlinear waves will explore phenomena such as hexagonal superlattice patterns with multiple spatial periodicities. %%% This a renewal project which will extend our understanding of nonlinear physical phenomena that can give rise to complex or unpredictable behavior. The project will focus especially on granular or particulate materials and fluids, using small scale laboratory experiments. The training of undergraduate students in research will be an important aspect of this work. An extensive study will be made of the motion of layers of granular material when subjected to shear forces. Shear friction in granular layers is potentially important in connection with earthquakes, though these studies are aimed at achieving a basic understanding. Delicate force measurements will be combined with optical imaging to understand the onset of sudden slipping events, and the localized precursors that occur in advance of major events. A second area of study will involve fluid mixing phenomena, in which a passive impurity is transported or mixed by a fluid flow, which may contain a porous medium such as sand. Studies of this type may be relevant to the transport of impurities in soils. ***
小行星9704301 这是一个更新的项目,将扩大我们的非线性物理现象的理解,特别是那些涉及颗粒材料和流体,使用小规模的实验室实验,并涉及本科生。 将对颗粒层中的剪切摩擦现象进行广泛的研究。 精细的剪切力测量将与同步显微成像相结合。 这些改进将使粘滑运动的开始、前兆和向连续滑动的过渡得以详细研究。 一个目标是比较和对比颗粒摩擦与固体-固体摩擦。 第二个重点将是流体混合现象的研究,其中被动杂质是由流动混合。 这些实验将包括随机细胞流中的混沌平流和粒状介质中的运输的调查。 最后,继续对非线性波的图案形成和动力学进行实验,将探索具有多个空间周期性的六边形超晶格图案等现象。 这是一个更新的项目,它将扩展我们对非线性物理现象的理解,这些现象可能导致复杂或不可预测的行为。 该项目将特别关注颗粒或微粒材料和流体,使用小规模的实验室实验。 本科生的研究培训将是这项工作的一个重要方面。 将对颗粒材料层在剪切力作用下的运动进行广泛的研究。 颗粒层中的剪切摩擦在与地震有关的方面具有潜在的重要性,尽管这些研究旨在获得基本的理解。 精细的力测量将与光学成像相结合,以了解突然滑动事件的发生,以及在重大事件之前发生的局部前兆。 研究的第二个领域将涉及流体混合现象,其中被动杂质被流体流运输或混合,该流体流可能包含多孔介质,例如沙子。 这类研究可能与杂质在土壤中的迁移有关。 ***
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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Jerry Gollub其他文献
Jerry Gollub的其他文献
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{{ truncateString('Jerry Gollub', 18)}}的其他基金
Spatiotemporal Chaos and Particle Dynamics in Complex Flows
复杂流动中的时空混沌和粒子动力学
- 批准号:
0803153 - 财政年份:2008
- 资助金额:
$ 29.7万 - 项目类别:
Continuing Grant
RUI: Granular Dynamics, and Fluid Mixing in Complex Flows
RUI:颗粒动力学和复杂流动中的流体混合
- 批准号:
0405187 - 财政年份:2004
- 资助金额:
$ 29.7万 - 项目类别:
Continuing Grant
RUI: Granular Materials, Fluid Mixing, and Related Nonlinear Phenomena
RUI:颗粒材料、流体混合和相关非线性现象
- 批准号:
0072203 - 财政年份:2000
- 资助金额:
$ 29.7万 - 项目类别:
Continuing Grant
RUI: Dynamics of Interfacial Patterns
RUI:界面模式的动力学
- 批准号:
9319973 - 财政年份:1994
- 资助金额:
$ 29.7万 - 项目类别:
Continuing Grant
Film Flow Instabilities & Spatiotemporal Dynamics
薄膜流动不稳定性
- 批准号:
9115005 - 财政年份:1992
- 资助金额:
$ 29.7万 - 项目类别:
Continuing Grant
Research in Undergraduate Institutions: Pattern Formation from Interfacial Instabilities: Dendritic Solidification (Materials Research)
本科院校研究:界面不稳定性的图案形成:枝晶凝固(材料研究)
- 批准号:
8503543 - 财政年份:1985
- 资助金额:
$ 29.7万 - 项目类别:
Continuing Grant
Optical Studies of Pattern Evolution, Secondary Instabilities, and Weak Turbulence
模式演化、二次不稳定性和弱湍流的光学研究
- 批准号:
8310933 - 财政年份:1983
- 资助金额:
$ 29.7万 - 项目类别:
Continuing Grant
Stochastic Flow and Nonlinear Dynamics
随机流和非线性动力学
- 批准号:
7912150 - 财政年份:1980
- 资助金额:
$ 29.7万 - 项目类别:
Continuing Grant
Collaborative Research on Time-Dependent Instabilities And the Transition to Turbulence in Simple Systems
简单系统中瞬态不稳定性和湍流转变的合作研究
- 批准号:
7682511 - 财政年份:1977
- 资助金额:
$ 29.7万 - 项目类别:
Continuing Grant
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