Space-time characteristics of wall pressure and shear-stress fluctuations in a turbulent boundary layer = 난류 경계층 내의 벽압력 및 벽면마찰 섭동량의 시공간적 특성

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A large eddy simulation is performed to investigate the space-time characteristics of wall pressure and shear-stress fluctuations in a turbulent boundary layer. To generate time-dependent inflow data in a spatially-evolving turbulent boundary layer, the rescaling technique proposed by Lund et al. (1998) is employed. A fully-implicit fractional step method is used to simulate the flow. This method is validated by testing a direct numerical simulation of turbulent channel flow. Computational results are presented to disclose the ability of simulation to capture the turbulent statistics close to the wall. Based on the LES data in a turbulent boundary layer, several wall turbulence statistics are scrutinized. Emphasis is placed on the spectra of wall pressure and shear-stress fluctuations. The convection velocities with different definitions are also examined.
Advisors
Sung, Hyung-Jinresearcher성형진researcher
Description
한국과학기술원 : 기계공학전공,
Publisher
한국과학기술원
Issue Date
2000
Identifier
158207/325007 / 000983140
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학전공, 2000.2, [ viii, 57 p. ]

Keywords

Wall shear-stress fluctuations; Wall pressure fluctuations; Turbulent boundary layer; Space-time characteristics; 시공간적 특성; 벽면마찰 섭동량; 벽압력 섭동량; 난류 경계층

URI
http://hdl.handle.net/10203/45137
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=158207&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
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