Path transition of freely falling thin disks

H.-J. Zhong; C.-B. Lee

doi:10.1117/12.854746

14 April 2010 Path transition of freely falling thin disks

H.-J. Zhong, C.-B. Lee

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 752212 (2010) https://doi.org/10.1117/12.854746
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

Abstract

The free falling motions of thin circular disks in still water were investigated experimentally. All six degrees of freedom of a falling disk were determined by a stereoscopic vision method. For the disk of small dimensionless moment of inertia (I* < 6.0 × 10^-3), three types of motions were identified, including a planar zigzag one and two newly discoveried motions. The two new motion both have non-planar trajectory and continous rotation about the disk's symmetry axis. Flow visualizations were also carried out to show the wake structures with different types of motions.

Citation Download Citation

H.-J. Zhong and C.-B. Lee "Path transition of freely falling thin disks", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 752212 (14 April 2010); https://doi.org/10.1117/12.854746

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