@article{oai:miyazaki-u.repo.nii.ac.jp:00002437,
 author = {小園, 茂平 and Ozono, Shigehira and 出口, 新 and Deguchi, Arata},
 journal = {宮崎大学工学部紀要, Memoirs of Faculty of Engineering, University of Miyazaki},
 month = {Aug},
 note = {Abstract 
It is well-known that a soft tennis ball hit with topspin tends to curve down, but we 
often experience a wetted ball appears to bend upward on rainy days. The purpose of the 
present study is to understand this puzzling motion. First, we observed a trajectory of a 
falling wetted circular cylinder suspended with a thread, from which the aerodynamic 
force coefficients were estimated. Using these values, trajectories of the flying dry and 
wetted soft tennis ball were simulated by a finite difference method. It was found that the 
wetted ball with topspin does not bend upward, but travels in a significantly flatter 
trajectory.},
 pages = {9--15},
 title = {濡れた表面をもつソフトテニスボールの飛翔特性},
 volume = {35},
 year = {2006},
 yomi = {オゾノ, シゲヒラ and デグチ, アラタ}
}