The use of LES to analyse higher-order moments of two-point statistics

Abstract

Abstract The models prescribed by the IEC standard for the generation of wind fields, as well as intermittent modifications of the original models, are used as inflows in LES. The behaviour of the wind fields is investigated with regard to higher-order moments. It is shown that all models reach an intermittent state in the LES. This intermittent state can be determined by the intermittency parameter and by higher orders of the moments. It can be seen that the Kaimal model generates significantly lower intermittency than the other models. The convergence length is significantly reduced with a correct intermittency description in the wind fields.