Structure of Turbulence in a Fully Transpired Channel
Deng, Zhiqun
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https://hdl.handle.net/2142/87711
Description
Title
Structure of Turbulence in a Fully Transpired Channel
Author(s)
Deng, Zhiqun
Issue Date
2003
Doctoral Committee Chair(s)
Adrian, Ronald J.
Department of Study
Theoretical and Applied Mechanics
Discipline
Theoretical and Applied Mechanics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Mechanical
Language
eng
Abstract
In summary, changing the form of the wall material affects its flow impedance, and reducing the wall impedance increases near-wall temporal fluctuations due to the pressure fluctuations imposed on the wall. The evidence found in this investigation suggests that the temporal fluctuations at the wall are amplified strongly by the mean strain field, and result in enhanced turbulence downstream. Therefore, the details of the transpired wall boundary conditions are very important, and non-ideal boundary conditions can lead to substantial modification in the flow structure.
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