前沿研究分享:大涡模拟(Large Eddy Simulation) 点击上方蓝字了解更多计算与STEM领域研究前沿 文一: TOSCA——一个用于风电场流量的开源、有限体积、大涡模拟(LES)环境 摘要: 风能项目的数量和规模不断增长,加上高性能计算技术的快速增长,正促使研究人员对整个风电场周围的流场进行大规模模拟。鉴于此类模拟涉及大量自...
The Large Eddy Simulation (LES) is based on a scale separation. The large scales which contain the most energy and transport the flow properties are resolved, but the small scales which behave in universal way are simply modeled. LES is accurate, but it is rather computationally expensive. Lar...
Large-Eddy Simulation is a numerical 3D CFD tool well suited to study the origin of abnormal combustion hazards like knock or rumble in downsized direct injection engines. These phenomena are characterised by uncontrolled spontaneous auto-ignition of fresh gases at high loads, leading to detonation ...
The work of Bhuiyan and Alam [16] led to a scale-adaptive large-eddy simulation (LES) method for the land–atmosphere exchange over complex terrain. The LES of a wind farm in complex terrain can partially resolve the turbulence kinetic energy (TKE) and the Earth’s surface topography, ...
The last problem was seen as “particularly challenging for large-eddy simulation, since even very small eddies may be highlyanisotropic, and therefore a correct sub-grid model is difficult to formulate”. Grötzbach (1987)expressed similar views: ...
Large eddy simulation (LES) is a popular technique for simulating turbulent flows. An implication of Kolmogorov's (1941) theory of self similarity is that the large eddies of the flow are dependant on the geometry while the smaller scales more universal. This feature allows one to explicitly so...
Detached Eddy Simulation of Massively Separated Flows, 39th AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV Note The default values of the DES constants implemented are code-specific values calibrated for OpenFOAM using decaying isotropic turbulence, and hence deviate slightly from the values sugg...
2.2. Large-Eddy Simulation (LES) Eddies describe the turbulent motions of a fluid by a broad spectrum of length and time scales. The characteristic expansion of the time-averaged flow (example: shear layer thickness) is a typical comparable method to describe the extent of the largest eddies....
LES:LargeEddySimulation ILES:ImplicitLargeEddySimulation MILES:MonotoneIntegratedLargeEddySimulation VLES:VeryLargeEddySimulation WMLES:Wall-ModeledLargeEddySimulation SGS:subgrid-scale WALE:Wall-AdaptingLocalEddy-Viscosity What is Large Eddy Simulation?
Formulation of the Dutch Atmospheric Large-Eddy Simulation (DALES) and overview of its applications, T. Heus et al,Geosci. Model Dev., 3, 415-444, 2010 Ouwersloot, H.G., Moene, A.F., Attema, J.J. et al. Large-Eddy Simulation Comparison of Neutral Flow Over a Canopy: Sensitivities...