| 项目编号: | 1510615
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| 项目名称: | UNS:Collaborative Research: Multiscale interactions between active particles and stratified fluids during collective vertical migration |
| 作者: | Eckart Meiburg
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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: | 2015-09-15
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| 结束日期: | 2018-08-31
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| 资助金额: | USD200028
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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: | motion
; project
; fluid motion
; eckartthis collaborative project
; research student
; on-demand vertical migration
; stratified fluid layer
; fluid-structure interaction
; top fluid layer
; two-dimensional particle imaging velocimetry
; collective motion
; fluid layer
|
| 英文摘要: | CBET - 1510607/1510615
PI: Dabiri, John/Meiburg, Eckart
This collaborative project uses experiments and numerical simulation to investigate the collective motion of small swimming organisms in water. The hypothesis underlying the project is that the collective motion of many small organisms can induce fluid motion over length scales that are much larger than the organism itself. The investigators will focus on motion in stratified fluid layers, which are commonly found in the ocean, where the top fluid layer usually is warmer and saltier than deeper fluid layers. The stratification can lead to an instability that induces fluid motion, but the presence of the swimming organisms may change conditions for the onset of the motion and affect detailed flow patterns and fluid mixing that result from the motion. Although the research focuses on motion in the ocean as an example, the insights gained from the project will apply to other particulate and multiphase systems. Both investigators will involve high school students, undergraduates and graduate students in the project. Results from the project will be used in outreach efforts to engage in the research students from groups that are traditionally underrepresented in science and engineering.
The objective of the proposal is to address experimentally and numerically the fundamental questions of multi-scale, many-body, fluid-structure interactions in stratified layers. The experiments will use a unique system that can produce on-demand vertical migrations of plankton via phototaxis in a controlled laboratory setting. A laser-guidance system will control swimming speed and swimmer spacing in collective motions. Two-dimensional particle imaging velocimetry will be used to measure flows generated by the swimmers' motion. The numerical methods implemented in the project are capable of simulating large numbers of swimming organisms with fidelity sufficient for studying details of both the near- and far-field flows. Numerical simulations will help test the possibility that collective swimming motions drive large-scale convection by modifying effective diffusivities of heat and salinity so as to induce double-diffusive convection. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/93281
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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: | |
Eckart Meiburg. UNS:Collaborative Research: Multiscale interactions between active particles and stratified fluids during collective vertical migration. 2014-01-01.
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