Towards aeraulic simulations at urban scale using the lattice Boltzmann method

被引:28
作者
Obrecht, Christian [1 ]
Kuznik, Frederic [1 ]
Merlier, Lucie [1 ]
Roux, Jean-Jacques [1 ]
Tourancheau, Bernard [2 ]
机构
[1] Univ Lyon, CNRS, UMR5008, INSA Lyon,CETHIL, F-69621 Villeurbanne, France
[2] Univ Grenoble, UJF Grenoble, LIG UMR5217, F-38041 Grenoble 9, France
关键词
Computational fluid dynamics; Lattice Boltzmann method; Urban flow; Large eddy simulation; High-performance computing; FLOW; DISPERSION; GPU; IMPLEMENTATION; ENVIRONMENT; PROJECT; MODELS; RANS;
D O I
10.1007/s10652-014-9381-0
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The lattice Boltzmann method (LBM) is an innovative approach in computational fluid dynamics (CFD). Due to the underlying lattice structure, the LBM is inherently parallel and therefore well suited for high performance computing. Its application to outdoor aeraulic studies is promising, e.g. applied on complex urban configurations, as an alternative approach to the commonplace Reynolds-averaged Navier-Stokes and large eddy simulation methods based on the Navier-Stokes equations. Emerging many-core devices, such as graphic processing units (GPUs), nowadays make possible to run very large scale simulations on rather inexpensive hardware. In this paper, we present simulation results obtained using our multi-GPU LBM solver. For validation purpose, we study the flow around a wall-mounted cube and show agreement with previously published experimental results. Furthermore, we discuss larger scale flow simulations involving nine cubes which demonstrate the practicability of CFD simulations in building external aeraulics.
引用
收藏
页码:753 / 770
页数:18
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