Towards aeraulic simulations at urban scale using the lattice Boltzmann method

Obrecht, Christian; Kuznik, Frédéric; Merlier, Lucie; Roux, Jean-Jacques; Tourancheau, Bernard

doi:10.1007/s10652-014-9381-0

Cited by 33 publications

(11 citation statements)

References 31 publications

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“…Another promising alternative to usual CFD simulations based on the Navier-Stokes equations as it does not alter model accuracy is to use the lattice Boltzmann method (LBM) for urban aeraulic simulation [87]. Due to its local and explicit formulation, this method is inherently parallel and allows a very cost effective implementation on GPUs [88] thus substantially reducing computational time compared to usual CFD methods.…”

Section: Microclimatic Modelsmentioning

confidence: 99%

Modeling the heating and cooling energy demand of urban buildings at city scale

Frayssinet

Merlier

Kuznik

et al. 2018

Renewable and Sustainable Energy Reviews

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162

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Many computational approaches exist to estimate heating and cooling energy demand of buildings at city scale, but few existing models can explicitly consider every buildings of an urban area, and even less can address hourly-or less-energy demand. However, both aspects are critical for urban energy supply designers. Therefore, this paper gives an overview of city energy simulation models from the point of view of short energy dynamics, and reviews the related modeling techniques, which generally involve detailed approaches. Analysis highlights computational costs of such simulations as key issue to overcome towards reliable microsimulation of the power demand of urban areas. Relevant physical and mathematical simplifications as well as efficient numerical and computational techniques based on uncertainties analysis and error quantification should thus be implemented.

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Section: Microclimatic Modelsmentioning

confidence: 99%

Modeling the heating and cooling energy demand of urban buildings at city scale

Frayssinet

Merlier

Kuznik

et al. 2018

Renewable and Sustainable Energy Reviews

Self Cite

162

View full text Add to dashboard Cite

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“…Using advanced aeraulic models such as Computational Fluid Dynamics 11,12 is useful for computing the outside pressure map of the building in detail. These models can take into account the wind direction, three-dimensional obstacles and turbulent air flows.…”

Section: Technical Solutions For Air Flow Rate Estimationmentioning

confidence: 99%

Cost-effective air flow rate estimations using blowerdoor and wind speed measurements to assess building envelope thermal performances

Thébault

Millet

2016

Journal of Building Physics

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Thermal performance discrepancies between theory and practice in buildings is a well known issue. Reducing this gap is crucial for enhancing energy efficient building construction and renovation. To measure the actual transmission heat loss coefficient of a building from in situ testing, an evaluation of time-varying infiltration losses needs to be quantified to improve the result’s precision, especially for short dynamic methods. This study first presents a theoretical analysis to explain why this evaluation is necessary and how to perform it using different technical approaches (simplified aeraulic models and tracer gas). An experimental comparison of four of these solutions on a small shed reveals that blowerdoor and wind speed measurements can be sufficient to evaluate infiltration losses with acceptable accuracy. Results of the identified transmission losses coefficient [Formula: see text] using the In Situ Assessment of Building EnvoLope pErformances (ISABELE) method shows how much the bias is reduced by including permeability specifications and local wind speed measurements. ISABELE is a measurement method of the overall transmission heat loss coefficient of a building.

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“…To take advantage of these merits, we developed an LBM-based model for turbulent atmospheric boundary layer flow simulations and predictions. The LBM model has the potential to achieve real-time simulations on a typical desktop or laptop with a modern GPU (Obrecht et al 2015;King et al 2017;Lenz et al 2019;Onodera et al 2013) for large computational domains with several millions of computation grid points. Furthermore, the generation of computational grids for complex surface boundaries (e.g., urban geometries) in an LBM is very easy, and simple interpolation or immersed boundary methods (Guo et al 2002;Mei et al 1999;Filippova and Hänel 1998) can be applied.…”

Section: Introductionmentioning

confidence: 99%

“…More recently, there have been many publications using regularized LBM-LES and cumulant LBM for turbulent urban flow applications (Jacob et al 2018;Merlier et al 2019;Margheri and Sagaut 2016;Jacob and Sagaut 2018;Mons et al 2017;King et al 2017;Lenz et al 2019). However, there is limited literature on MRT LBM modeling of turbulent flows (Krafczyk et al 2003;Yu et al 2006;Obrecht et al 2015;Wang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Large-Eddy Simulations of Turbulent Flows around Buildings Using the Atmospheric Boundary Layer Environment–Lattice Boltzmann Model (ABLE-LBM)

Wang

Decker

Pardyjak

2020

Journal of Applied Meteorology and Climatology

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A three-dimensional, prognostic Atmospheric Boundary Layer Environment-Lattice Boltzmann Model (ABLE-LBM) using the multiple-relaxation-time lattice Boltzmann method was developed for large-eddy simulation of urban boundary layer atmospheric flows. In this article we describe the details of the ABLE-LBM for urban flow, its implementation of complex boundaries, and the subgrid turbulence parameterizations. As a first validation of this newly developed model, the simulation results were evaluated with two wind-tunnel datasets that were collected using particle image velocimetry and Irwin probes, respectively. The ABLE-LBM simulations use the same building layout and Reynolds numbers used in the laboratory wind tunnels. The ABLE-LBM simulations compare favorably to both laboratory studies in terms of the mean wind fields. The turbulent fluxes simulated by the model in the observational planes also agreed reasonably well with the laboratory results. The model produced urban canyon flows and vortices on the lee side and over the building tops that are similar to those of the laboratory studies in strength and location. This validation study using laboratory data indicates that our new ABLE-LBM is a viable approach for modeling atmospheric turbulent flows in urban environments. A numerical implementation using a graphics processing unit shows that real-time simulations are achieved for these two validation cases.

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Towards aeraulic simulations at urban scale using the lattice Boltzmann method

Cited by 33 publications

References 31 publications

Modeling the heating and cooling energy demand of urban buildings at city scale

Modeling the heating and cooling energy demand of urban buildings at city scale

Cost-effective air flow rate estimations using blowerdoor and wind speed measurements to assess building envelope thermal performances

Large-Eddy Simulations of Turbulent Flows around Buildings Using the Atmospheric Boundary Layer Environment–Lattice Boltzmann Model (ABLE-LBM)

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