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

Buffa, Elisa; Jacob, Jérôme; Sagaut, Pierre

doi:10.1016/j.jweia.2021.104560

Cited by 21 publications

(9 citation statements)

References 82 publications

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“…They are naturally obtained considering the truncation of direct expansion of the continuous Maxwellian onto Hermite polynomial basis 3 . These methods have been observed to be very efficient for low-Mach athermal flows [4][5][6][7][8] , their use for the type of flows mentioned above is much less satisfactory, since both robustness and accuracy issues have been reported in several cases. This is especially true for high speed supersonic flows and multiphase flows with high density ratio.…”

Section: Introductionmentioning

confidence: 99%

A unified hybrid lattice-Boltzmann method for compressible flows: Bridging between pressure-based and density-based methods

et al. 2021

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A unified expression for high-speed compressible segregated consistent lattice Boltzmann methods, namely, pressure-based and improved density-based methods, is given. It is theoretically proved that in the absence of forcing terms, these approaches are strictly identical and can be recast in a unique form. An important result is that the difference with classical density-based methods lies in the addition of fourth-order term in the equilibrium function. It is also shown that forcing terms used to balance numerical errors in both original pressure-based and improved density-based methods can be written in a generalized way. A hybrid segregated efficient lattice-Boltzmann for compressible flow based on this unified model, equipped with a recursive regularization kernel, is proposed and successfully assessed on a wide set of test cases with and without shock waves.

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Section: Introductionmentioning

confidence: 99%

A unified hybrid lattice-Boltzmann method for compressible flows: Bridging between pressure-based and density-based methods

et al. 2021

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“…The domain boundaries are integrated using the cut cell method, which enables complex geometries to be modeled while substantially reducing the preprocessing costs (see Feng et al's work [21] for details), and a synthetic eddy method (SEM, [22]) was developed to generate inlet turbulence [23].…”

Section: Key Features Of the Present Lattice Boltzmann Methodsmentioning

confidence: 99%

“…With δx = 1.56 × 10 −3 m and δt = 1.5 × 10 −5 s and six refinement levels, the total number of grid points was 5.8 × 10 6 . More details can be found in the work of Buffa et al [23].…”

Section: Prediction Of Surface Pressure On a High-rise Buildingmentioning

confidence: 99%

Lattice Boltzmann Method-Based Simulations of Pollutant Dispersion and Urban Physics

et al. 2021

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Mesocale atmospheric flows that develop in the boundary layer or microscale flows that develop in urban areas are challenging to predict, especially due to multiscale interactions, multiphysical couplings, land and urban surface thermal and geometrical properties and turbulence. However, these different flows can indirectly and directly affect the exposure of people to deteriorated air quality or thermal environment, as well as the structural and energy loads of buildings. Therefore, the ability to accurately predict the different interacting physical processes determining these flows is of primary importance. To this end, alternative approaches based on the lattice Boltzmann method (LBM) wall model large eddy simulations (WMLESs) appear particularly interesting as they provide a suitable framework to develop efficient numerical methods for the prediction of complex large or smaller scale atmospheric flows. In particular, this article summarizes recent developments and studies performed using the hybrid recursive regularized collision model for the simulation of complex or/and coupled turbulent flows. Different applications to the prediction of meteorological humid flows, urban pollutant dispersion, pedestrian wind comfort and pressure distribution on urban buildings including uncertainty quantification are especially reviewed. For these different applications, the accuracy of the developed approach was assessed by comparison with experimental and/or numerical reference data, showing a state of the art performance. Ongoing developments focus now on the validation and prediction of indoor environmental conditions including thermal mixing and pollutant dispersion in different types of rooms equipped with heat, ventilation and air conditioning systems.

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“…Setting the computational boundary needs to be considered before the numerical simulation of mountain terrain [26][27][28]. e side and top surfaces of the calculation area are set as symmetrical boundary conditions according to engineering experience [29,30].…”

Section: Boundary Conditions and Numerical Algorithmsmentioning

confidence: 99%

Wind Field Characteristics of Butte and the Influence on the Wind-Induced Responses of Transmission Towers

Zhang

Huang

Wang

2022

Advances in Materials Science and Engineering

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The computational fluid dynamics (CFD) simulation on the butte was carried out to obtain the wind field characteristics for a specific mountain in the hilly area of eastern China. Then, the speed-up ratios of butte at each location distributed by height were calculated. The simulation results were compared with the specified value of mountain wind field acceleration ratio in various codes. The finite element model of the transmission tower line system is established by ANSYS, and the wind-induced vibration response of the structural system under the single mountain wind field is calculated, which is compared with the results of flat ground. The results show that the mountain will hinder the fluid passing through it. There is a deceleration zone in front of the mountain and a flow separation phenomenon behind the mountain. The speed-up ratios at the butte top where accelerating effect are the biggest among all positions of the butte. As the height increases, they approach 1. The speed-up ratios calculated by the Chinese code and the Australian code are linearly changing along the ridge of the butte and are symmetric at the windward side and leeward side. The biggest speed-up ratios are calculated by the Chinese code, and the smallest ratios are calculated by CFD. The wind-induced vibration response of the transmission tower line system is influenced by the wind speed-up ratios and reaches the maximum at the top of the butte. The simulation results at the windward side are close to the values calculated by the Australia code and the Euro code, but at the top and leeward side, they are far smaller than others.

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

Cited by 21 publications

References 82 publications

A unified hybrid lattice-Boltzmann method for compressible flows: Bridging between pressure-based and density-based methods

A unified hybrid lattice-Boltzmann method for compressible flows: Bridging between pressure-based and density-based methods

Lattice Boltzmann Method-Based Simulations of Pollutant Dispersion and Urban Physics

Wind Field Characteristics of Butte and the Influence on the Wind-Induced Responses of Transmission Towers

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