In many applications the drag coefficient is assumed to grow linearly with wind speed. This relation is based on experiments that have been conducted in the second half of the 20th century. Post-2000 experiments, however, show that the drag coefficient has a maximum somewhere in the range 30-35 m/s. This report reviews the relevant literature and comes with recommendations on what parameterization of the drag coefficient should be used.
A. Sterl. Drag at high wind velocities - a review
KNMI number: TR-361, Year: 2017, Pages: 33