Wind and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Wind flow over sinusoidal hilly obstacles located in a uniform flow

  • Received : 2001.03.05
  • Accepted : 2002.03.22
  • Published : 2002.12.25
⟨ Previous Next ⟩

Abstract

The wind flow over two-dimensional sinusoidal hilly obstacles with slope (the ratio of height to half width) of 0.5 has been investigated experimentally and numerically. Experiments for single and double sinusoidal hill models were carried out in a subsonic wind tunnel. The mean velocity profiles, turbulence statistics, and surface pressure distributions were measured at the Reynolds number based on the obstacle height(h=40 mm) of $2.6{\times}10^4$. The reattachment points behind the obstacles were determined using the oil-ink dot and tuft methods. The smoke-wire method was employed to visualize the flow structure qualitatively. The finite-volume-method and the SIMPLE-C algorithm with an orthogonal body-fitted grid were used for numerical simulation. Comparison of mean velocity profiles between the experiments and the numerical simulation shows a good agreement except for the separation region, however, the surface pressure data show almost similar distributions.

Keywords

References

  1. Bergeles, G. (1985), "Numerical calculation of turbulent flow around two-dimensional hills", J. Wind Eng. Ind. Aerody., 21, 307-321. https://doi.org/10.1016/0167-6105(85)90042-X
  2. Bowen, A.J. and Lindley, D. (1977), "A wind tunnel investigation of the wind speed and turbulence characteristics close to the ground over various escarpment shapes", Boundary-Layer Meteorol., 12, 259-271. https://doi.org/10.1007/BF00121466
  3. Bradshaw, P. (1973), "Effects of streamline curvature on turbulent flow", Agardograph, 169.
  4. Glekas, J., Bergeles, G. and Athanassiadis N. (1987), "Numerical solution of the transport equation for passive contaminations in three-dimensional complex terrain", Int. J. Num. Meth. Fluids, 7, 319-335. https://doi.org/10.1002/fld.1650070403
  5. Jackson, P.S. and Hunt, J.C.R. (1975), "Turbulent flow over a low hill", Quart. J. Roy. Meteorol. Soc., 101, 929-955. https://doi.org/10.1002/qj.49710143015
  6. Jones, W.P. and Launder, B.E. (1972), "The prediction of laminarization with a two-equation model of turbulence", Int. J. Heat Mass Transfer, 15, 301-314. https://doi.org/10.1016/0017-9310(72)90076-2
  7. Kang, I.S. and Leal, L.G. (1992), "Orthogonal grid generation in a 2D domain via the boundary integral technique", J. Comput. Phys., 102, 78-87. https://doi.org/10.1016/S0021-9991(05)80007-5
  8. Kim, H.G., Lee, C.M., Lim, H.C., and Kyong, N.H. (1997), "An experimental and numerical study on the flow over two-dimensional hills", J. Wind Eng. Ind. Aerod., 66, 17-33. https://doi.org/10.1016/S0167-6105(97)00007-X
  9. Langston, L.S. and Boyle, M.T. (1982), "A new surface-streamline flow-visualization technique", J. Fluid Mech., 125, 53-57. https://doi.org/10.1017/S0022112082003243
  10. Launder, B.E. and Sharma, B.T. (1974), "Application of the energy dissipation model of turbulence to the calculation of flow near a spinning disc", Lett. Heat Mass Transfer, 1, 131-138.
  11. Pearse, J.R. (1982), "Wind flow over conical hills in a simulated atmospheric boundary layer", J. Wind Eng. Ind. Aerod., 10, 303-313. https://doi.org/10.1016/0167-6105(82)90004-6
  12. Petryk, S. and Brundertt, E. (1967), Department of Mechanical Engineering, Univ. of Waterloo, Res. Rep. No. 4.
  13. Siegel, R. (1976), "Three-dimensional potential flow over hills and oval mounds", NASA Tech. Note TN D-8375.
  14. Tani, I. (1987), "Turbulent boundary layer development over rough surface", Perspectives in Turbulence Studies, Meier, H. U. and Bradshaw, P., Eds., Springer.
  15. Taylor, P.A. (1997), "Turbulent boundary-layer flow over topography", 2nd European & African Conference on Wind Engineering, 25-44.
  16. Wilcox, D.C. (1993), "Turbulence modeling for CFD", DCW Industries, Inc., 460.

Cited by

  1. Numerical simulation of flow past 2D hill and valley vol.7, pp.1, 2004, https://doi.org/10.12989/was.2004.7.1.001
  2. Investigation of three-dimensional wind flow behaviour over coastal dune morphology under offshore winds using computational fluid dynamics (CFD) and ultrasonic anemometry vol.36, pp.8, 2011, https://doi.org/10.1002/esp.2139
  3. Numerical Evaluation of Wind Flow over Complex Terrain: Review vol.17, pp.4, 2004, https://doi.org/10.1061/(ASCE)0893-1321(2004)17:4(135)
  4. Airflow reversal and alternating corkscrew vortices in foredune wake zones during perpendicular and oblique offshore winds vol.187, 2013, https://doi.org/10.1016/j.geomorph.2012.12.037
  5. Wind flow simulations on idealized and real complex terrain using various turbulence models vol.75, 2014, https://doi.org/10.1016/j.advengsoft.2014.05.002
  6. Escoamento Atmosférico sobre uma Colina Isolada Revelado a Partir de Dados de um Veículo Aéreo não Tripulado (VANT) vol.34, pp.2, 2002, https://doi.org/10.1590/0102-77863340028