Turbulence modeling of atmospheric boundary layer flow over complex terrain: a comparison of models at wind tunnel and full scale

Kasmi, Amina El; Masson, Christian

doi:10.1002/we.390

Cited by 21 publications

(8 citation statements)

References 44 publications

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“…The influence of the grass-filled area is modeled with wall functions [7], indicating the corresponding surface roughness length z 0 (∼0.03 m). The landfill mound is modelled as a soft Gaussian hill with varying height [8].…”

Section: Physics Setup and Solution Methodsmentioning

confidence: 99%

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The influence of orographic features on wind farm efficiencies

Peralta

Schmidt

Stoevesandt

2014

ITM Web of Conferences

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Abstract. We employ Reynolds averaged Navier-Stokes (RANS) solvers for performing computational fluid dynamics (CFD) simulations of a neutral atmospheric boundary layer (ABL) for a wind farm located on a complex terrain. We also consider the influence of an adjacent hill/forest on the performance of the wind farm. We study an incompressible, isothermal, stationary wind field by solving the RANS equations using the k-model. The forest canopy is included as a porous media, with trees of fixed height, using a porous media RANS solver. The presence of wind turbines is taken into account using an actuator disk model, extended for the whole wind farm.

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Section: Physics Setup and Solution Methodsmentioning

confidence: 99%

“…The new tool is capable of adding artificial orographic features. The landfill is modelled as an oval Gaussian hill of varying height, with peak height of 10 m [8]. We use 6,250,000 hexahedral cells for the simulations presented in this paper.…”

Section: Meshmentioning

confidence: 99%

The influence of orographic features on wind farm efficiencies

Peralta

Schmidt

Stoevesandt

2014

ITM Web of Conferences

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“…Since observations are generally used to calibrate C µ and C ε2 , either C ε1 or σ ε are adjusted such that Condition 9 is respected. El Kasmi and Masson [70] have tailored the RNG k − ε model constants in an analogous fashion. Some common sets of model constants are listed in Table 1.…”

Section: Simulation Of the Homogeneous Neutral Surface Layermentioning

confidence: 99%

“…The Sirhowy Valley simulations further demonstrated the ability of the RNG model to predict separation and reattachment. El Kasmi and Masson have also applied the RNG model for flow over Blashavel hill [70].…”

Section: Prediction Of the Flowfield Over Real Terrainmentioning

confidence: 99%

CFD in Wind Energy: The Virtual, Multiscale Wind Tunnel

2010

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Over the past two decades, computational fluid dynamics and particularly the finite volume method have been increasingly used to predict the performance of wind turbines within their environment. Increases in available computational power has led to the application of RANS-based models to more and more complex flow problems and permitted the use of LES-based models where previously not possible. The following article reviews the development of CFD as applied by the wind energy community from small to large scale: from the flow around 2D airfoils to the flow through an entire wind farm.

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“…Among the numerical models, the Reynolds-averaged Navier-Stokes (RANS) approach with two-equation turbulence models has been widely used for wind prediction over complex terrains [1][2][3][4][5][6][7][8][9]. However, it must be mentioned that the RANS models provide solutions on the mean wind speed and the mean level of turbulent kinetic energy due to the Reynolds-averaged approach [10].…”

Section: Introductionmentioning

confidence: 99%

Full-Scale Experimental Validation of Large-Eddy Simulation of Wind Flows over Complex Terrain: The Bolund Hill

Chaudhari

Hellsten

Hämäläinen

2016

Advances in Meteorology

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Numerical simulation of local atmospheric flows around a complex topography is important for many wind energy applications, as it can help in locating and optimizing wind farms. The aim of this paper is to simulate the atmospheric flows over the challenging and complex site of Bolund Hill (in Denmark) using Large-Eddy Simulations (LES) and to validate the simulation methodology against full-scale measurements. Wind prediction over a potential inland wind park is the main application of the validated LES methodology. For the first time, LES-based results from more than one wind direction of the Bolund case are reported and analyzed in detail herein. The LES results from each direction are compared with the Bolund field data in a quantitative way, for example, by using simulation error. According to the results comparison, it is found that the LES model provides by far the most accurate prediction for turbulent kinetic energy. The simulation error of this LES model for predicting turbulent kinetic energy is 19% smaller than that of all other models, whether experimental or numerical, employed previously over Bolund Hill.

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Turbulence modeling of atmospheric boundary layer flow over complex terrain: a comparison of models at wind tunnel and full scale

Cited by 21 publications

References 44 publications

The influence of orographic features on wind farm efficiencies

The influence of orographic features on wind farm efficiencies

CFD in Wind Energy: The Virtual, Multiscale Wind Tunnel

Full-Scale Experimental Validation of Large-Eddy Simulation of Wind Flows over Complex Terrain: The Bolund Hill

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