Airflow over the RRS Discovery: variation of velocity errors with wind speed

This report describes the simulation of the flow of air around the RRS Discovery, using the Computational Fluid Dynamics package "Vectis". Two simulations were made; the first for a wind speed of 6 m/s and the second for a wind speed of 20 m1s. The effects of the disturbance to the air flow, caused by the ship's hull and superstructure, are calculated for an anemometer sited on the foremast platform of the ship. These results are compared to those from an earlier simulation with a wind speed of 14 m/so. In all cases, the ship was modelled for an air flow directly over the bows,i.e. "head-to-wind".