Nguyen Van Luc, Le Tuan Phuong Nam and Phan Toai Tuyn 2024. Numerical investigation of the collision of a vortex ring with a wavy sphere. Vietnam Journal of Science, Technology and Engineering. 66, 4 (Dec. 2024), 57-63. DOI:https://doi.org/10.31276/VJSTE.2024.0056.