Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Numerical simulation of the neutral atmospheric surface layer flow over real terrain: the Askervein Hill case
Submission Author:
William C. Radünz , SP , Brazil
Co-Authors:
Adriane Prisco Petry, William C. Radünz
Presenter: William C. Radünz
doi://10.26678/ABCM.COBEM2017.COB17-0478
Abstract
The demand for more accurate numerical wind flow models, used for predicting the micro-scale wind climate of a proposed wind farm, requires extensive validation against high-quality atmospheric-scale experiments. In the present study, the open-source platform OpenFOAM is used to simulate the atmospheric surface layer wind over one of such experiments, namely the Askervein hill. Consistency was ensured by proper choice of the $k-\epsilon$ model constants, wall-functions and inflow conditions, which means a sustainable fully-developed boundary layer is achieved. Three choices of the constant $C_\mu$ were evaluated with four grids so as to assess the sensitivity. Generally, the models were able to predict the wind behavior but overestimated the wind speed in the lee, whilst underpredicted the turbulence kinetic energy. The Atmospheric formulation performed slightly better than the other models, but still resulted in unacceptable errors in wind speed.
Keywords
Askervein Hill, Turbulence Model, k-epsilon, OpenFOAM
