International Journal of High-Rise Buildings (국제초고층학회논문집)

Council on Tall Building and Urban Habitat Korea (한국초고층도시건축학회)
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Numerical Simulation of Wind Pressures on a High-rise Building by Auto-mesh System

  • Tang, Yuanzhe (College of Civil Engineering, Tongji University) ;
  • Cao, Shuyang (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University)
  • Published : 2019.12.01
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Abstract

This paper describes large eddy simulation of wind pressures on a square cylinder in a uniform flow and a high-rise building immersed in an atmospheric turbulent boundary layer. For the atmospheric boundary layer case, the inflow turbulence is generated by a numerical wind tunnel. In the numerical simulation, particular attention is devoted to the performance of an auto hexahedral non-structural mesh. Both simulations are performed for three grid systems: an auto hexahedral non-structured grid, a structured Cartesian grid and a non-structured triangular prism grid, and for three grid numbers. The present study shows that the auto hexahedral unstructured mesh achieves the best simulation results for wind pressures on the square cylinder and the high-rise building. When the grid number is sufficiently large, the differences among the results obtained from the three investigated grid systems are not significant. However, the advantage of the auto hexahedral unstructured mesh becomes clear when the grid number decreases, because it enables a balanced distribution of orthogonal grids. The results described in this paper demonstrate that the auto hexahedral non-structured mesh has good potential applicability to simulation of urban flows.

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References

  1. AIJ (2015). Recommendations for loads on buildings. Tokyo, Wind Engineering Center.
  2. Blocken, B. (2013). CFD simulation of pedestrian-level wind conditions around buildings: Past achievements and prospects. J. Wind Eng. Ind. Aerodyn., 121, 138-145. https://doi.org/10.1016/j.jweia.2013.08.008
  3. Bearman, P. W. & Obasaju, E. D. (1982). An experimental study of pressure fluctuations on fixed and oscillating square-section cylinders. Journal of Fluid Mechanics, 119, 297. https://doi.org/10.1017/S0022112082001360
  4. Cao, Y. and Tamura, T. (2016). Large-eddy simulations of flow past a square cylinder using structured and unstructured grids. Computers & Fluids, 137, 36-54. https://doi.org/10.1016/j.compfluid.2016.07.013
  5. Cheng, C.M., Lu, P..C, Chen, R.H. (1992). Wind loads on square cylinder in homogeneous turbulent flows. Journal of Wind Engineering. 41, 739-749.
  6. Durao, G., Heitor, V, Pereira, F. (1988). Measurements of turbulent and periodic flows around a square cross-section cylinder. Experiments in Fluids, 6(5), 298-304. https://doi.org/10.1007/BF00538820
  7. Frohlich, J. et al. (1998). Large eddy simulation of flow around circular cylinders on structured and unstructured Grids. Notes on Numerical Fluid Mechanics, 66, 319-338. https://doi.org/10.1007/978-3-663-10916-7_16
  8. Huang, S., Li, Q. S., Xu, S. (2008). Numerical evaluation of wind effects on a tall steel building by CFD. Steel Construction, 63(5), 612-627. https://doi.org/10.1016/j.jcsr.2006.06.033
  9. Irwin, P. (1981). The design of spires for wind simulation. Journal of Wind Engineering and Industrial Aerodynamics,7, 361-366. https://doi.org/10.1016/0167-6105(81)90058-1
  10. Lee, B.E. (2006). The effect of turbulence on the surface pressure field of a square prism. Journal of Fluid Mechanics, 69(2), 263-282. https://doi.org/10.1017/S0022112075001437
  11. Lubcke, H., Schmidt, S., Rung, T. (2001). Comparison of LES and RANS in bluff-body flows. Journal of Wind Engineering & Industrial Aerodynamics, 89(14), 1471-1485. https://doi.org/10.1016/S0167-6105(01)00134-9
  12. Lyn, D.A., Einav, S., Rodi, W. (2006). A laser Doppler velocimetry study of ensemble-averaged characteristics of the turbulent near wake of a square cylinder. Journal of Fluid Mechanics, 304, 285-319. https://doi.org/10.1017/S0022112095004435
  13. McLean, I., Gartshore, I. (1992). Spanwise correlation of pressure on a rigid square section cylinder. Journal of Wind Engineering. 41, 779-808.
  14. Nishimura, H., Taniike, Y. (2000). Fluctuating pressures on a two-dimensional square prism. Journal of Structural and Construction Engineering, 533, 37-43. (in Japanese). https://doi.org/10.3130/aijs.65.37_3
  15. Noda, S. (2016). Evaluation of wind force acting on a high-rising building by LES and simulation of wind-excited response. Tokyo Institute of Technology.
  16. Norberg, C. (1993). Flow around rectangular cylinders: Pressure forces and wake frequencies. Journal of Wind Engineering & Industrial Aerodynamics, 49(1-3), 187-196. https://doi.org/10.1016/0167-6105(93)90014-F
  17. Nozu, T., Tamura, T., Okuda, Y., Sanada, S. (2008). LES of the flow and building wall pressures in the center of tokyo. Journal of Wind Engineering and Industrial Aerodynamics, 96, 1762-1773. https://doi.org/10.1016/j.jweia.2008.02.028
  18. Ohno, O. and Tamura, T. "Unsteady numerical simulation of turbulent flow at the area with high-rise buildings" (in Japanese). Proc. the annual meeting of AIJ, Tokyo, Japan, August, 2001, 99.
  19. Phillips, D.A and Soligo, M.J. (2019). Will CFD ever replace wind tunnels for building wind simulations?. International Journal of High-Rise Buildings. 8(2), 107-116. https://doi.org/10.21022/IJHRB.2019.8.2.107
  20. Srinivas, Y., Biswas, G., Parihar, A.S. (2006). Large-eddy simulation of high Reynolds number turbulent flow past a square cylinder. Journal of Engineering Mechanics. 132(3),327-335. https://doi.org/10.1061/(ASCE)0733-9399(2006)132:3(327)
  21. Tamura, T., Kono, T., Cao, S., Tsubokura Y., Okuda, Y., and Okada, H. (2003) "Numerical analysis of wind loads on tall buildings in urban area". Proc. the CIB-CTBUH Conference on Tall Buildings, Malaysia, 531-538.
  22. Uemura, K. and Saito, T. (1993). Automatic mesh generation for FEM simulation of wind flow around tall buildings. Journal of Wind Engineering and Industrial Aerodynamics, 46-47, 357-362. https://doi.org/10.1016/0167-6105(93)90301-4
  23. Weatherill, N.P. (1990). Mixed structured-unstructured meshesfor aerodynamic flow simulation. Aeronautical Journal, 94, 934.