WRF/MPAS Workshop

The impact of spatio-temporal varying wave fields on offshore wind farm performance

Sima Hamzeloo

DTU Wind and Energy Systems

The air-sea and particularly wind-wave interactions affect offshore wind turbines' performance and their loads.

WRF model is a well-known tool for mesoscale simulations. For high spatial resolutions, when computational mesh sizes reach the order of meters, the terrain-following vertical levels becomes limited because of the poor mesh quality. By increasing resolution, Sharp changes in geometrical features of the terrain can skew the grid cells, which leads to numerical errors. Therefore, approaches such as the immersed boundary method (IBM) can be used to overcome this in the WRF model. At high resolution, WRF could be in large-eddy simulation mode. This study aims at using a WRF-LES-IBM system for the implementation of varying wave fields as a moving terrain. So, time-varying wave fields will be applied as the surface boundary condition of the simulation. Then, we can investigate how wave fields modify the MABL, atmospheric flow characteristics, and wind turbines and farm performance.