대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제26권2호
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  • Pages.261-268
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  • 2002
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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평판 사이 정방형실린더 주위의 난류 유동에 대한 LES

Large-Eddy Simulation of Turbulent Flow Past a Square Cylinder Confined in a Channel

  • 발행 : 2002.02.01
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초록

Turbulent flow past a square cylinder confined in a channel is numerically investigated by Large Eddy Simulation(LES). The main objectives of this study are to verify the experimental results of Nakagawa et al.[Exp. in Fluids, Vol. 27, 3, pp. 284∼294, 1999] by LES and to obtain related flow information in detail. The LES results obtained are in excellent agreement with the experiment both qualitatively and quantitatively. The passive paticles numerically released into the flow field clearly show the barman vortex street. However, the vortices shed from the cylinder are significantly affected by the presence of the plates. Futhermore, periodic and alternating vortex-rollups are observed in the vicinity of the plates. The rolled-up vortex is convected downstream together with the corresponding Karman vortex forming a counter-rotating vortex pair. It is also revealed that the cylinder greatly enhances mixing process of the flow.

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참고문헌

  1. Nakagawa, S., Senda, M., Kikkawa, S., Wakasugi, H. and Hiraide, A., 1996, 'Heat Transfer in a Channel Flow with Rectangular Cylinder,' Proceedings of the 3rd KSME-JSME, Thermal Engineering Conference, Vol. 1, pp. 501-506
  2. Koutmos, P., Mavridis, C., and Papailiou, D., 1996, 'A Study of Turbulent Diffusion Flames Formed by Planar Fuel Injection into the Wake Formation Fegion of a Slender Square Cylinder,' Twenty-Sixth Simposium (International) on Combustion/The Combustion Institute, pp. 161-168
  3. Bakrozis, A. G., Papailiou, D. D., and Koutmos, P., 1999, 'A Study of the Turbulent Structure of a Two-Dimensional Diffusion Flame Formed Behind a Slender Bluff-Body,' Combustion and Flame, 119, pp. 291-306 https://doi.org/10.1016/S0010-2180(99)00061-9
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