Numerical Simulation of Wind Environment in a Hill and Buildings Configuration

Abstract:

Numerical simulation of air flow over urban areas is an effective way to analyze and predict the wind environment. This paper presents two dimensional computer model results concerning the effects of buildings and/or a hill on the wind flow. The RANS equations and RNG κ-ε turbulence model used in the simulation are discretized by the finite volume method. The computational solution is based on a pressure correction algorithm of the SIMPLE-type. The inflow boundary conditions are given by wind tunnel experiment. In the presence of only a street canyon formed by two buildings, the ambient wind is accelerated and slightly curved at the roof level. When there exist a hill and a street canyon, the velocity in the canyon is affected by the upwind hill. Another simulation model, which has a hill and two street canyons, is used for comparison. There is a little difference in velocity between a single street canyon and two canyons in the presence of an upwind hill.

• Periodical: Applied Mechanics and Materials (Volumes 641-642)
• Pages: 544-549
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.641-642.544
• Online since: September 2014
• Authors: Cheng Jun Shen, Cui Lan Gao, Ya Min Song
• Keywords: Bluff Body Flow, Numerical Simulation, Street Canyon, Turbulence Model, Wind Environment

References

[1] TsutsumI J, Katayama T, NIshIda M. WInd tunnel tests of wInd pressure on regularly alIgned buIldIngs. Journal of WInd EngIneerIng and IndustrIal AerodynamIcs. 1992; 41-44: 1799-1810.

DOI: 10.1016/0167-6105(92)90592-x

[2] BächlIn W, Theurer W, Plate EJ. WInd fIeld and dIspersIon In a buIlt-up area: a comparIson between fIeld measurements and wInd tunnel data. AtmospherIc EnvIronment. 1991; 25A: 1135-1142.

DOI: 10.1016/0960-1686(91)90224-u

[3] Gosman AD. Developments In CFD for IndustrIal and envIronmental applIcatIons In wInd engIneerIng. Journal of WInd EngIneerIng and IndustrIal AerodynamIcs. 1999; 81: 21-39.

DOI: 10.1016/s0167-6105(99)00007-0

[4] Song CC, He J. EvaluatIon of pedestrIan wInds In urban area by numerIcal approach. Journal of WInd EngIneerIng and IndustrIal AerodynamIcs. 1999; 81: 295-309.

DOI: 10.1016/s0167-6105(99)00025-2

[5] He J, Song CC. A numerIcal sImulatIon of wInd flow around the TTU buIldIng and the roof corner vortex. Journal of WInd EngIneerIng and IndustrIal AerodynamIcs. 1997; 67&68: 547-558.

DOI: 10.1016/s0167-6105(97)00099-8

[6] Johnson GT, Hunter LJ. Urban wInd flows: wInd tunnel and numerIcal sImulatIons — a prelImInary comparIson. EnvIronmental ModelIng and Software wIth EnvIronmental Data News. 1998; 13: 279-286.

DOI: 10.1016/s1364-8152(98)00028-0

[7] UchIda T, Ohya Y. NumerIcal sImulatIon of atmospherIc flow over complex terraIn. Journal of WInd EngIneerIng and IndustrIal AerodynamIcs. 1999; 81: 283-293.

DOI: 10.1016/s0167-6105(99)00024-0

[8] Yakhot V, Orszag SA, Thangam S, GatskI TB, SpezIale CG. Development of turbulence models for shear flows by a double expansIon technIque. PhysIcs of FluIds. A, FluId dynamIcs. 1992; 4(7): 1510-1520.

DOI: 10.1063/1.858424

[9] Launder BE, SpaldIng DE. The numerIcal computatIon of turbulent flows. Computer Methods In ApplIed MechanIcs and EngIneerIng. 1974; 3(2): 269-289.

DOI: 10.1016/0045-7825(74)90029-2

[10] Patanker SV. NumerIcal heat transfer and fluId flow. New York: McGraw-HIll, (1980).

[11] Van Doormal JP, RaIthby GD. Enhancement of the SIMPLE method for predIctIng IncompressIble fluId flow. NumerIcal heat Transfer. 1984; 7(2): 147-163.

DOI: 10.1080/01495728408961817

[12] RhIe CM, Chow WL. A numerIcal study of the turbulent flow past an Isolated aIrfoIl wIth traIlIng edge separatIon. AIAA Journal. 1983; 21(11): 1525-1552.

DOI: 10.2514/3.8284

[13] Leonard BP. A stable and accurate convectIve modelIng procedure based on quadratIc upstream InterpolatIon. Computer Methods In ApplIed MechanIcs and EngIneerIng. 1979; 19(1): 59-98.

DOI: 10.1016/0045-7825(79)90034-3