| 项目编号: | 1438203
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| 项目名称: | Resolving the Structure of Turbulence in Rough Wall Channel Flows Using 3D, Time Resolved, Multiscale Velocity Measurements |
| 作者: | Joseph Katz
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| 承担单位: | Johns Hopkins University
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| 批准年: | 2013
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| 开始日期: | 2014-09-01
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| 结束日期: | 2017-08-31
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| 资助金额: | USD159015
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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: | wall
; measurement system
; 3d time-resolved tomographic piv
; small-scale turbulence
; large scale structure
; solid wall
; roughness height
; turbulence statistics
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| 英文摘要: | PI: Katz, Joseph
Proposal Number: 1438203
The proposed research aims to explore how turbulence is generated and sustained close to solid boundaries. It will use findings from very accurate experiments to clarify the way that energy is transferred in turbulent flows between the different regions of the flow. As such, this research would allow the development of correct models for the design of flow systems where solid walls are present, which are in fact the most common cases of turbulent flows in industry and the environment. Educational activities involve graduate and undergraduate students for the development and implementation of the proposed measurement system. There are also activities planned for Baltimore City high-school students to work yearlong in the PI?s laboratory as part of their required Research Practicum.
This work will investigate how the roughness height, wavelength, spatial arrangement and uniformity, affect the generation of vortices, their evolution in time, their interactions with vortices away from the wall, and impact of these interactions on turbulence statistics. A rather comprehensive and non-trivial experimental approach is proposed: A 3D time-resolved tomographic PIV will resolve small-scale turbulence near the wall, while digital holographic microscopy (DHM) will be used to simultaneously observe the large scale structures away from the wall. The combined TPIV-DHM instrument would resolve 3.5 orders of magnitude of length scales. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95886
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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: | |
Joseph Katz. Resolving the Structure of Turbulence in Rough Wall Channel Flows Using 3D, Time Resolved, Multiscale Velocity Measurements. 2013-01-01.
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