Towards LES as a design tool: Wind loads assessment on a high-rise building

Ricci, M.; Patruno, L.; Kalkman, I Ivo; Miranda, Stefano de; Blocken, Bje Bert

doi:10.1016/j.jweia.2018.07.009

Cited by 56 publications

(10 citation statements)

References 37 publications

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“…They found that the turbulent wind inflow results in a larger mean and a fluctuating value of the drag coefficient. Extensive numerical studies have also been performed, generally achieving satisfactory agreement with experimental results (Tominaga et al 2008;Huang, Li & Wu 2010;Tominaga 2015;Yan & Li 2015;Ricci et al 2018;Thordal et al 2019). Investigations into the flow around high-rise buildings have so far focused predominantly on aerodynamic forces.…”

Section: Introductionmentioning

confidence: 82%

Attenuation of the unsteady loading on a high-rise building using feedback control

Morgans

2022

J. Fluid Mech.

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The unsteady wind loading on high-rise buildings has the potential to influence strongly their structural performance in terms of serviceability, habitability and occupant comfort. This paper investigates numerically the flow structures around a canonical high-rise building immersed in an atmospheric boundary layer, using wall-resolved large eddy simulations. The switching between two vortex shedding modes is explored, and the influence of the atmospheric boundary layer on suppressing symmetric vortex shedding is identified. It is shown that the antisymmetric vortex shedding mode is prevalent in the near wake behind the building, with strong coherence between the periodic fluctuations of the building side force and the antisymmetric vortex shedding mode demonstrated. Two feedback control strategies, exploiting this idea, are designed to alleviate the aerodynamic side-force fluctuations, using pressure sensing on just a single building wall. The sensor response to synthetic jet actuation along the two ‘leading edges’ of the building is characterised using system identification. Both the designed linear controller and the least mean square adaptive controller attenuate successfully the side-force fluctuations when implemented in simulations. The linear controller exhibits a better performance, and its effect on the flow field is to delay the formation of dominant vortices and increase the extent of the recirculation region. Feedback control that requires a smaller sensing area is then explored, with a comparable control effect achieved in the attenuation of the unsteady loading. This study could motivate future attempts to understand and control the unsteady loading of a high-rise building exposed to oncoming wind variations.

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Section: Introductionmentioning

confidence: 82%

Attenuation of the unsteady loading on a high-rise building using feedback control

Morgans

2022

J. Fluid Mech.

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“…10%). The procedure is similar to the one proposed by Bruno et al (2010) and adopted by Ricci et al (2018): the time history is divided into N D sub-windows of length T; then the average (or the standard deviation) φ n is computed over a time t n ¼ [0, nT], where n ¼ 1, 2 … N D . The residuals percentage is computed as: 1 for the points on the lateral sides, in agreement with experimental observations.…”

Section: Declaration Of Competing Interestmentioning

confidence: 99%

Lattice-Boltzmann-based large-eddy simulation of high-rise building aerodynamics with inlet turbulence reconstruction

Buffa

Jacob

Sagaut

2021

Journal of Wind Engineering and Industrial Aerodynamics

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“…Many studies of tall buildings use smaller domains than those recommended above, but there is little consistency between the domain sizes used in such studies [e.g. (Braun and Awruch, 2009;Huang et al, 2007Huang et al, , 2011Ricci et al, 2018;Zhang et al, 2015)].…”

Section: Introductionmentioning

confidence: 99%

Optimising the computational domain size in CFD simulations of tall buildings

Abu-Zidan

Mendis

Gunawardena

2021

Heliyon

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Recently, there has been a growing interest in utilizing computational fluid dynamics (CFD) for wind resistant design of tall buildings. A key factor that influences the accuracy and computational expense of CFD simulations is the size of the computational domain. In this paper, the effect of the computational domain on CFD predictions of wind loads on tall buildings is investigated with a series of sensitivity studies. Four distinct sources of domain error are identified which include wind-blocking effects caused by short upstream length, flow recirculation due to insufficient downstream length, global venturi effects due to large blockage ratios, and local venturi effects caused by insufficient clearance between the building and top and lateral domain boundaries. Domains based on computational wind engineering guidelines are found to be overly conservative when applied to tall buildings, resulting in uneconomic grids with a large cell count. A framework for optimizing the computational domain is proposed which is based on monitoring sensitivity of key output metrics to variations in domain dimensions. The findings of this paper help inform modellers of potential issues when optimizing the computational domain size for tall building simulations.

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Towards LES as a design tool: Wind loads assessment on a high-rise building

Cited by 56 publications

References 37 publications

Attenuation of the unsteady loading on a high-rise building using feedback control

Attenuation of the unsteady loading on a high-rise building using feedback control

Lattice-Boltzmann-based large-eddy simulation of high-rise building aerodynamics with inlet turbulence reconstruction

Optimising the computational domain size in CFD simulations of tall buildings

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