Numerical simulation of flow over topographic features by revised k– ε models

• Published in: Journal of wind engineering and industrial aerodynamics Vol. 91; no. 1; pp. 231 - 245
• Main Authors: Lun, Yu Fat, Mochida, Akashi, Murakami, Shuzo, Yoshino, Hiroshi, Shirasawa, Taichi
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier Ltd 2003; Elsevier Science
• Subjects: Applied sciences; Buildings. Public works; Cliff; Climatology and bioclimatics for buildings; Computation methods. Tables. Charts; Durbin model; Exact sciences and technology; Flow over terrains; Hill; Revised k– ε; Shih model; Structural analysis. Stresses; Cliff; Shih model; Hill; Revised k– ε; Durbin model; Flow over terrains; Turbulence; Power plant; International conference; Cliffs; Revised k-ε; Aerodynamics; Two dimensional model; Forecast model; Air flow; Wind energy; Site selection; Complex terrain; Numerical simulation
• ISSN: 0167-6105; 1872-8197
• DOI: 10.1016/S0167-6105(02)00348-3

The accurate prediction of the wind energy distribution over terrains is important for making an appropriate selection of a suitable site for installing wind power plant. In this study, two-dimensional numerical simulations of flow over two common types of topographic features, i.e. a cliff and a hill, are presented. Three types of turbulence models, namely standard k– ε and its revised linear form (Durbin model) as well as a revised nonlinear form (Shih model) are employed in this work. The performance of these models in predicting flow over these features is investigated. The accuracy of the prediction by using a z 0 type wall function to reproduce the effect of surface roughness on flowfield from these turbulence models is also examined.