Lattice-Boltzmann large-eddy simulation of pollutant dispersion in complex urban environment with dense gas effect: Model evaluation and flow analysis

Merlier, Lucie; Jacob, Jérôme; Sagaut, Pierre

doi:10.1016/j.buildenv.2018.11.009

Cited by 30 publications

(17 citation statements)

References 28 publications

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“…The capability of the LBM‐LES tool to predict the dispersion of a gaseous pollutant in complex urban areas is now illustrated. For the sake of validation, the MODITIC data basis is used (Merlier et al., 2019; Robins et al., 2016).…”

Section: Benchmarking: Complex Urban Flowsmentioning

confidence: 99%

ProLB: A Lattice Boltzmann Solver of Large‐Eddy Simulation for Atmospheric Boundary Layer Flows

Feng

Fuentes

Guo

et al. 2021

J Adv Model Earth Syst

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The atmospheric boundary layer (ABL) ranges from hundreds of meters to several kilometers depending on meteorological conditions, mainly wind, temperature, and humidity. Thus, structure of ABL is modified by the daily cycle of heating and cooling over Earth's surface producing three canonical types of boundary layers: convective or unstable, neutral, and stable boundary layers. Convective boundary layer is commonly observed during day when the surface is heated by the sun resulting in a positive buoyancy force, while stable boundary layer occurs during night when surface is cooled by radiation producing a negative buoyancy force, and neutral boundary layer is the case between the former two with little or no buoyancy. The structure of ABL has an important effect on anthropic activities such as mesoscale weather forecasting or pollutant dispersion in urban areas (Fernando et al., 2001). To better understand ABL and related urban processes, numerical simulation is a good complement to field measurements and wind tunnel experiments (Blocken, 2015). In the past much attention has been paid to the accurate CFD modeling of the ABL, both using Reynolds-averaged Navier-Stokes and large-eddy simulation (LES) approaches. LES (Sagaut, 2006), which is a high-fidelity approach for the unsteady simulation of turbulent flows, has been successfully applied to simulation of ABL (e.g.,

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Section: Benchmarking: Complex Urban Flowsmentioning

confidence: 99%

ProLB: A Lattice Boltzmann Solver of Large‐Eddy Simulation for Atmospheric Boundary Layer Flows

Feng

Fuentes

Guo

et al. 2021

J Adv Model Earth Syst

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“…It is observed to yield accurate and robust results for a broad range of applications and flow physics, e.g. [32,33,14,34,35].…”

Section: Pressure-based Lattice-boltzmann Solver Coupled To a Predictorcorrector Approachmentioning

confidence: 99%

“…Nonphysical mass flux is coming in the domain because the top and bottom walls do not conserve exactly the mass with the reconstruction method. To solve this problem, we used the second boundary condition (33) The mass coming in the domain with the BB boundary condition is better controlled with incoming velocity values of the order of 1e −3 m/s compared to 1e −1 m/s with the reconstruction method. We will hence use the bounce back condition for the bubble test case.…”

Section: Rising Bubblementioning

confidence: 99%

Compressible pressure-based Lattice-Boltzmann applied to humid air with phase change

Cheylan

Zhao

Boivin

et al. 2021

Applied Thermal Engineering

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A new compressible pressure-based Lattice Boltzmann Method is proposed to simulate humid air flows with phase change. The variable density and compressible effects are fully resolved, effectively lifting the Boussinesq approximation commonly used, e.g. for meteorological flows. Previous studies indicate that the Boussinesq assumption can lead to errors up to 25%, but the model remains common, for compressible models often suffer from a lack of stability. In order to overcome this issue, a new pressure-based solver is proposed, exhibiting excellent stability properties. Mass and momentum conservation equations are solved by a hybrid recursive regularized Lattice-Boltzmann approach, whereas the enthalpy and species conservation equations are solved using a finite volume method. The solver is based on a pressure-based method coupled with a predictor-corrector algorithm, and incorporates a humid equation of state, as well as a specific boundary condition treatment for phase change. In particular, boundary conditions that handle mass leakage are also proposed and validated. Three test cases are investigated in order to validate this new approach: the Rayleigh-Bénard instability applied to humid air, the atmospheric rising of a condensing moist bubble, and finally the evaporation of a thin liquid film in a vertical channel. Results indicate that the proposed pressure-based Lattice-Boltzmann model is stable and accurate on all cases.

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“…The second limitation is equally lifted, after derivation of a new collision model compatible with thermal, multicomponent flows. This was achieved following Jacob et al [29], who recently proposed a robust collision model in the context of single-component athermal LBM showing promising results for a wide range of applications [30][31][32][33][34]. As further discussed in this study, the collision kernel adopts a regularization strategy [35] in which the nonhydrodynamic moments of the distribution function (or ghost modes) relax infinitely fast to equilibrium.…”

Section: Introductionmentioning

confidence: 99%

Hybrid regularized Lattice-Boltzmann modelling of premixed and non-premixed combustion processes

Tayyab

Zhao

Feng

et al. 2020

Combustion and Flame

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A Lattice-Boltzmann model for low-Mach reactive flows is presented, built upon our recently published model (Comb & Flame, 196, 2018). The approach is hybrid and couples a Lattice-Boltzmann solver for the resolution of mass and momentum conservation and a finite difference solver for the energy and species conservation. Having lifted the constant thermodynamic and transport properties assumptions, the model presented now fully accounts for the classical reactive flow thermodynamic closure: each component is assigned NASA coefficients for calculating its thermodynamic properties. A temperature-dependent viscosity is considered, from which are deduced thermo-diffusive properties via specification of Prandtl and component-specific Schmidt numbers. Another major improvement from our previous contribution is the derivation of an advanced collision kernel compatible of multicomponent reactive flows stable in high shear flows. Validation is carried out first on premixed configurations, through simulation of the planar freely propagating flame, the growth of the associated Darrieus-Landau instability and three regimes of flame-vortex interaction. A double shear layer test case

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Lattice-Boltzmann large-eddy simulation of pollutant dispersion in complex urban environment with dense gas effect: Model evaluation and flow analysis

Cited by 30 publications

References 28 publications

ProLB: A Lattice Boltzmann Solver of Large‐Eddy Simulation for Atmospheric Boundary Layer Flows

ProLB: A Lattice Boltzmann Solver of Large‐Eddy Simulation for Atmospheric Boundary Layer Flows

Compressible pressure-based Lattice-Boltzmann applied to humid air with phase change

Hybrid regularized Lattice-Boltzmann modelling of premixed and non-premixed combustion processes

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