Abstract
This study investigates the method of wind speed estimation from rain drop trajectories by using Particle Tracking Velocimetry technique. In our previous report, it is confirmed that the average wind speed estimated from the trajectories of water drops in uniform flow, which is made in wind tunnel, has an accuracy of less than 5%. However, the instantaneous wind speeds estimated from the trajectory of an individual water drop varies and its cause is not investigated. Therefore, this study further investigates the process of wind speed estimation from water drop trajectories and aims to determine the causes of estimated wind speed fluctuation, with the intention to suggest a new method of wind speed estimation. Estimated wind speeds with the new method have a less deviation, compared to the wind speeds estimated with the previous method.
