파형벽면이 있는 채널내의 난류유동에 대한 수치해석Numerical Simulation of Turbulent Flow in a Wavy-Walled Channel

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Turbulent flow over a fully-developed wavy channel is investigated by the nonlinear $textsc{k}$-ε-f$_{u}$ model of Park et al.⑴ The Reynolds number is fixed at Reb = 6760 through all wave amplitudes and the wave configuration is varied in the range of 0≤a/λ≤0.15 and 0.25≤λ/H≤4.0. The predicted results for wavy channel are validated by comparing with the DNS data of Maaβ and Schumann$^{(2)}$ The model performance Is shown to be generally satisfactory. As the wave amplitude increases, it is found that the form drag grows linearly and the friction drag is overwhelmed by the form drag. In order to verify these characteristics, a large eddy simulation is performed for four cases. The dynamic model of Germane et al.$^{(3)}$ is adopted. Finally, the effects of wavy amplitude on separated shear layer are scrutinized.
Publisher
대한기계학회
Issue Date
2003-05
Language
Korean
Citation

대한기계학회논문집 B, v.27, no.5, pp.655 - 667

ISSN
1226-4881
URI
http://hdl.handle.net/10203/79268
Appears in Collection
ME-Journal Papers(저널논문)
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