Drag reduction characteristics of heated spheres falling into water*

Project supported by the National Natural Science Foundation of China (Grant No. 11672094).

Li Jia-Chuan, Wei Ying-Jie, Wang Cong, Xia Wei-Xue
       

(color online) Flow states around spheres at 40 cm underneath water surface at (a) Tw = 25 °C and Ts = 25 °C; (b) Tw = 95 °C and Ts = 500 °C; (c) Tw = 25 °C and Ts = 400 °C.