S051056 Turbulence Characteristics on the Numerical Wind Simulation for the Complex Terrain

Abstract

The purpose of this paper is the numerical prediction of the wind on the complex terrain and its turbulence characteristics. This paper shows the LES analysis of the complex terrain site and the power spectrum analysis of the turbulent wind. Because of the simplification of the flow condition at the inlet boundary, the LES analysis was applied for the sea wind case of the site and the results agreed with the 10 minutes averaged observations. This means the turbulence in the sea wind is generated mainly by the geographical features. Then, the turbulence characteristics of wind were shown by the power spectrum analysis of the wind speed data. The parameters for the power spectrum density model were derived by fitting the power spectrum at the measuring points into the model. The parameters showed the very turbulent characteristics of the wind on the complex terrain. Simultaneously, the length scale in the model could become the guideline for the resolution in the numerical simulation of the complex terrain.