| 项目编号: | 1512833
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| 项目名称: | UNS: Exploiting novel surface rheology to probe and tailor 2D suspension dynamics |
| 作者: | Todd Squires
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| 承担单位: | University of California-Santa Barbara
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| 批准年: | 2014
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| 开始日期: | 2015-06-15
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| 结束日期: | 2018-05-31
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| 资助金额: | USD289595
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Engineering - Chemical, Bioengineering, Environmental, and Transport Systems
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| 英文关键词: | 2d system
; dimensional suspension
; detailed particle dynamics
; surface pressure
; monolayer suspension
; such suspension
; surface rheology
; research
; two-dimensional suspension
; colloidal pair dynamics
; concentrated 2d suspension
; interfacial suspension
; effective rheology
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| 英文摘要: | The goal of the proposed research is to discover and understand phenomena that occur in two-dimensional suspensions of particles. These are particles that are suspended in solutions that are so spread-out that they form what are known as monolayer suspensions. This is a very fundamental problem with industrial and biological implications, since such suspensions are very common in both industry and nature, including emulsions and foams, cells, organelles and biological fluids.
The proposal is focused on the understanding of the rheological behavior of particulate dispersions embedded in insoluble monolayers of surfactants. Carefully conceived theoretical and experimental studies of model two-dimensional particulate dispersions are proposed. It is very important to note that the choice of a 2D system was made so that study of the lubrication phenomena in flows between approaching particles can reveal new modes of behavior in interfacial suspensions that have no analog in conventional three dimensional suspensions. In other words, this is a case where the investigation of a 2D system offers as rich a field of exploration and relevance to the real world as the investigation of 3D systems. The proposed research will involve theoretical analysis of a series of paradigmatic problems (e.g. lubrication flows and colloidal pair dynamics) involving monolayers whose surface rheology thickens, thins, or exhibits phase transitions as a function of surface pressure. It will also involve complementary experiments using photolithographically-designed particles and structures dispersed within surfactant monolayer. Exploratory experimental studies of concentrated 2D suspensions, including detailed particle dynamics, effective rheology, and discontinuous shear thickening will be conducted. Outreach and dissemination of research is planned, involving URM students in research. In addition, there are activities planned to reach out to 4th-6th grade students and attract them to mechanical, computer, and chemical engineering. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94398
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Todd Squires. UNS: Exploiting novel surface rheology to probe and tailor 2D suspension dynamics. 2014-01-01.
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