Wind and Structures

Techno-Press (테크노프레스)
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Large-eddy simulation and wind tunnel study of flow over an up-hill slope in a complex terrain

  • Tsang, C.F. (CLP Wind/Wave Tunnel Facility, The Hong Kong University of Science and Technology) ;
  • Kwok, Kenny C.S. (CLP Wind/Wave Tunnel Facility, The Hong Kong University of Science and Technology) ;
  • Hitchcock, Peter A. (CLP Wind/Wave Tunnel Facility, The Hong Kong University of Science and Technology) ;
  • Hui, Desmond K.K. (Transport Department)
  • Received : 2008.03.15
  • Accepted : 2009.03.05
  • Published : 2009.05.25
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Abstract

This study examines the accuracy of large-eddy simulation (LES) to simulate the flow around a large irregular sloping complex terrain. Typically, real built up environments are surrounded by complex terrain geometries with many features. The complex terrain surrounding The Hong Kong University of Science and Technology campus was modelled and the flow over an uphill slope was simulated. The simulated results, including mean velocity profiles and turbulence intensities, were compared with the flow characteristics measured in a wind tunnel model test. Given the size of the domain and the corresponding constraints on the resolution of the simulation, the mean velocity components within the boundary layer flow, especially in the stream-wise direction were found to be reasonably well replicated by the LES. The turbulence intensity values were found to differ from the wind tunnel results in the building recirculation zones, mostly due to the constraints placed on spatial and temporal resolutions. Based on the validated mean velocity profile results, the flow-structure interactions around these buildings and the surrounding terrain were examined.

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References

  1. Canuto, V.M. and Cheng, Y. (1997), "Determination of the Smagorinsky–Lilly constant CS", Phys. Fluids, 9, 1368-1378. https://doi.org/10.1063/1.869251
  2. Castro, I. and Graham, J.M.R. (1999), "Numerical Wind Engineering, the way ahead?", Proc. of Institute of Civil Engineers, Struct. Build. , 134(3), 275-277. https://doi.org/10.1680/istbu.1999.31569
  3. Deardorff, J.W. (1971), "On the magnitude of the subgrid-scale eddy coefficient", J. Comput. Phys., 7, 120-133. https://doi.org/10.1016/0021-9991(71)90053-2
  4. Glanville, M.J. and Kwok, K.C.S. (1997), "Measurements of topographic multipliers and flow separation from a steep escarpment. Part II Model measurements", J. Wind Eng. Ind. Aerod., 69-71, 893-902. https://doi.org/10.1016/S0167-6105(97)00215-8
  5. Hitchcock, P.A., Campbell, S., Hui, D.K.K., Thepmongkorn, S. and Kwok, K.C.S. (2006), "External wind pressures for a Hong Kong apartment building - wind tunnel test results", Proc. of 12th AWES Wind Engineering workshop, Queenstown, New Zealand.
  6. Hu, C.H. and Wang, F. (2005), "Using a CFD approach for the study of street-level winds in a built-up area", Build. Environ., 40(5), 617-631. https://doi.org/10.1016/j.buildenv.2004.08.016
  7. Huang, P.G. and Jacob, J.D. (1998), "On the development of an intelligent code validation system for the rapid transfer of turbulence model technology", Proc. of Fluids Engineering Division Summer Meeting, ASME Fluids Engineering division Summer meeting, June 21-25, 1-8.
  8. Kondo, K., Tscuchiya, T. and Sanada, S. (2002), "Evaluation of effect on micro-topography on design wind velocity", J. Wind Eng. Ind. Aerod., 90, 1707-1718. https://doi.org/10.1016/S0167-6105(02)00281-7
  9. Leschziner, M.A. (2003), "Computational modelling of complex turbulent flow-expectations, reality and prospects", J. Wind Eng. Ind. Aerod., 46-47, 37-51. https://doi.org/10.1016/0167-6105(93)90113-3
  10. Lubcke, H., Schmidt, S., Rung, T. and Thiele, F. (2001), "Comparison of LES and RANS in bluff-body flows", J. Wind Eng. Ind. Aerod., 89, 1471-1485. https://doi.org/10.1016/S0167-6105(01)00134-9
  11. Maruyama, T., Rodi, W., Maruyama, Y. and Hiraoka, H. (1999), "Large eddy simulation of the turbulent boundary layer behind roughness elements using an artificially generated flow", J. Wind Eng. Ind. Aerod., 83, 381-392. https://doi.org/10.1016/S0167-6105(99)00087-2
  12. Meyers, J., Geurts, B.J. and Sagaut, P. (2008), Quality and Reliability of Large-Eddy Simulation, 12, ERCOFTAC Series, Springer Netherlands, Netherlands.
  13. Mochida, A., Lun, I. (2008), "Prediction of Wind environment and Thermal comfort at Pedestrian level in urban area", J. Wind Eng. Ind. Aerod., 96, 1498-1527. https://doi.org/10.1016/j.jweia.2008.02.033
  14. Murakami, S. (1998), "Overview of turbulence models applied in CWE–1997", J. Wind Eng. Ind. Aerod., 74-76, 1-24. https://doi.org/10.1016/S0167-6105(98)00004-X
  15. Murakami, S. and Izuki, S. (1999), "CFD analysis of turbulent flow past a square cylinder using dynamic LES", J. Fluids Struct., 13, 1097-1112. https://doi.org/10.1006/jfls.1999.0246
  16. Oberkampf, W.L. and Trucano, T.G. (2002), "Verification and validation in computational fluid dynamics", Prog. Aerosp. Sci., 38(3), 209-272. https://doi.org/10.1016/S0376-0421(02)00005-2
  17. Raufeisen, A., Breuer, M., Botsch, T. and Delgado, A. (2009), "LES validation of turbulent rotating buoyancy– and surface tension–driven flow against DNS", Comput. Fluids, doi: 10.1016/j.compfluid.2009.01.002 (in press).
  18. Skote, M., Sandberg, M., Westerberg, U., Claesson, L. and Johansson, A.V. (2005), "Numerical and experimental studies of wind environment in an urban morphology", Atmos. Environ., 39(33), 6147-6158. https://doi.org/10.1016/j.atmosenv.2005.06.052
  19. Smirnov, A., Shi, S. and Celik, I. (2001), "Random flow generation technique for Large Eddy Simulations and particle dynamic modelling", J. Fluids Eng., 123, 359-371. https://doi.org/10.1115/1.1369598
  20. Tominaga, Y., Mochida, A., Shirasawa, T., Yoshie, R., Kataoka, H., Harimoto, K. and Nozu, T. (2004), "Cross comparison of CFD results of wind environment at pedestrian level around a high rise building and within a building complex" , J. Asian architect. Build. Eng., 3(1) , 63-70. https://doi.org/10.3130/jaabe.3.63
  21. Tominaga, Y., Mochida, A., Yoshie, R., Kataoka, H., Tsuyoshi, N., Masaru, Y. and Taichi, S. (2008), "AIJ guidelines for practical applications of CFD to pedestrian wind environment around buildings", J. Wind Eng. Ind. Aerod., 96, 1749-1761. https://doi.org/10.1016/j.jweia.2008.02.058
  22. Tutar, M. and Oguz, G. (2002), "Large eddy simulation of wind flow around parallel buildings with varying configurations", Fluid Dyn. Res., 31, 289-315. https://doi.org/10.1016/S0169-5983(02)00127-2
  23. Xie, X., Huang, Z. and Wang, J. (2006), "The impact of urban street layout on local atmospheric environment", Build. Environ., 41, 1352-1363. https://doi.org/10.1016/j.buildenv.2005.05.028

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