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http://dx.doi.org/10.3795/KSME-B.2003.27.5.655

Numerical Simulation of Turbulent Flow in n Wavy-Walled Channel  

Park, Tae-Seon (한국항공우주연구원, 로켓엔진그룹)
Sung, Hyung-Jin (한국과학기술원, 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.27, no.5, 2003 , pp. 655-667 More about this Journal
Abstract
Turbulent flow over a fully-developed wavy channel is investigated by the nonlinear $k-\varepsilon-f_\mu$ model of Park et al.(1) The Reynolds number is fixed at $Re_{b}$ = 6760 through all wave amplitudes and the wave configuration is varied in the range of $0\leq\alpha/\lambda\leq0.15$ and $0.25\leq{\lambda}/H\leq4.0$. The predicted results for wavy channel are validated by comparing with the DNS data of Maa$\beta$ 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.
Keywords
Wavy Wall; Nonlinear Stress-Strain Relation; Nonlinear $k-\varepsilon-f_\mu$ Model; Drag Coefficient; Large Eddy Simulation;
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