Using Computational Fluid Dynamics (CFD) for Pedestrian Winds

Stathopoulos, T.; Wu, Hao

doi:10.1061/40700(2004)51

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…In particular, three-dimensional (3D), steady-state, Reynolds-Averaged Navier Stokes (3D RANS) equations based CFD simulation has become a popular tool for modeling PLWE and evaluating pedestrian wind comfort in built-up areas (Stathopoulos and Wu 2004;Tominaga et al 2004;Yoshie et al 2007;Mochida and Lun 2008;Blocken and Person 2009;Janssen et al 2013). The popularity of 3D RANS simulation mainly resorts on its ability to simulate mean wind field faster and accurately, which are two essential features for evaluating PLWE using pedestrian-level mean wind speed (Stathopoulos and Wu 2004;Blocken and Stathopoulos 2013;Blocken et al 2016). Moreover, the use of 3D RANS simulations for PLWE studies is currently well established by abundantly available literature and further strengthened by the availability of best practice guidelines.…”

Section: Introductionmentioning

confidence: 99%

Pedestrian wind comfort near a super-tall building with various configurations in an urban-like setting

et al. 2020

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Pedestrian wind comfort near a 400 m super-tall building in high and low ambient wind speeds, referred to as Windy and Calm climates, is evaluated by conducting computational fluid dynamics (CFD) simulations. The super-tall building has 15 different configurations and is located at the center of 50 m medium-rise buildings in an urban-like setting. Pedestrian level mean wind speeds near the super-tall building is obtained from three-dimensional (3D), steady-state, Reynolds-Averaged Navier-Stokes (RANS)-based simulations for five incident wind directions (θ = 0°, 22.5°, 45°, 90°, 180°) that are subsequently compared with two wind comfort criteria specified for Calm and Windy climates. Results show a 1.53 times increase in maximum mean wind speed in the urban area after the construction of a square-shaped super-tall building. The escalated mean wind speeds result in a 23%-15% and 36%-29% decrease in the area with "acceptable wind comfort" in Calm and Windy climates, respectively. The area with pedestrian wind comfort varies significantly with building configuration and incident wind direction, for example, the configurations with sharp corners, large plan aspect ratios and, frontal areas and the orientation consistently show a strong dependency on incident wind direction except for the one with rounded plan shapes. Minor aerodynamic modifications such as corner modifications and aerodynamically-shaped configurations such as tapered and setback buildings show promise in improving pedestrian wind comfort in Windy climate.

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Section: Introductionmentioning

confidence: 99%

Pedestrian wind comfort near a super-tall building with various configurations in an urban-like setting

et al. 2020

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“…The experimental procedure is generally accomplished by using wind tunnel testing [1,5]. The numerical simulation is considered as an alternative solution of the wind tunnel study [2][3][4]6].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of wind effects on an airport air traffic control tower

Farouk¹,

Mourad²,

Salah-Eldin³

2007

WIT Transactions on the Built Environment, Vol 92

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Determination of wind action on high structures with special importance presents a major challenge for civil engineers. Different methods are used to calculate the wind action; simplified method, analytical method, numerical method and experimental method. In this research a three-dimensional numerical model was developed using Computational Fluid Dynamics "CFD" software to study the wind action on a New Airport Air Traffic Control Tower. The tower is nearly 107m high, comprises 15 ring beams and is located in an open area. The maximum wind speed used was based on the measured wind data for the structure location. The case study was solved as time-dependent, threedimensional and turbulent flow. A numerical simulation using 1.4 million hexahedral elements was developed. Pressure and viscous forces were determined on the entire tower and on each individual ring beam along the tower. The values and the locations of the maximum pressure and tension stresses were precisely specified. The results show that the maximum negative stresses (suction) are nearly twice the maximum positive stresses (pressure). In addition the forces and the moments acting on any ring beam calculated by the numerical simulation are nearly 65% less than those calculated by the code.

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“…These have been done only for few wind directions using simple turbulence modeling techniques. Surface mounted cubes are chosen for their geometrical simplicity yet represent the basic complex features of building aerodynamics, often the advantage of availability full-scale data for validation purpose, and acceptable costs (Stathopoulos & Wu, 2004). …”

Section: Current State Of Cwementioning

confidence: 99%

Computational Evaluation of Wind Loads on Low- and High- Rise Buildings

Dagnew¹

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Using Computational Fluid Dynamics (CFD) for Pedestrian Winds

Cited by 4 publications

References 4 publications

Pedestrian wind comfort near a super-tall building with various configurations in an urban-like setting

Pedestrian wind comfort near a super-tall building with various configurations in an urban-like setting

Numerical simulation of wind effects on an airport air traffic control tower

Computational Evaluation of Wind Loads on Low- and High- Rise Buildings

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