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Open AccessArticle

Aerodynamic Characteristics of New Volleyball for the 2020 Tokyo Olympics

1
Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba 305-8574, Japan
2
Japan Institute of Sports Sciences, Tokyo 115-0056, Japan
3
Faculty of Culture and Sport Policy, Toin University of Yokohama, Yokohama 225-8503, Japan
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(9), 3256; https://doi.org/10.3390/app10093256
Received: 8 April 2020 / Revised: 21 April 2020 / Accepted: 30 April 2020 / Published: 7 May 2020
(This article belongs to the Special Issue Design, Manufacture and Analysis of Sports Equipment)
The pattern of a modern volleyball is greatly different from that of a conventional volleyball, with several changes being made to the shape and design of the surface on the ball. Furthermore, at the 2020 Tokyo Olympics, a new volleyball (V200W; Mikasa) with 18 panels will be shown as the official ball. Therefore, this study compared the basic aerodynamic characteristics of conventional volleyballs with those of new designs in a wind tunnel. We used three full-size FIVB (Fédération Internationale de Volley-Ball) official volleyballs (V5M5000; Molten, MVA200; Mikasa and V200W; Mikasa) to determine the aerodynamic forces acting on each ball. The results indicate that the critical Reynolds number (Recr) differed depending on the ball types and their orientations. The Recr for the Molten ball (conventional) was determined to be ~3.4 × 105 (Cd = 0.17) on panel orientation A and ~2.7 × 105 (Cd = 0.14) on panel orientation B. Moreover, the Recr for the conventional Mikasa ball was determined to be ~2.6 × 105 (Cd = 0.14) on panel orientation A and ~3.0 × 105 (Cd = 0.13) on panel orientation B. On the other hand, the critical Reynolds number for the new volleyball (V200W) was ~2.9 × 105 (Cd = 0.17) in the panel orientation A and ~2.6 × 105 (Cd = 0.15) in panel orientation B. From these results, it can be hypothesized that, during a float serve, the flight trajectory will change depending on the type of volleyball and their orientation. View Full-Text
Keywords: aerodynamics; Tokyo Olympics; volleyball aerodynamics; Tokyo Olympics; volleyball
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MDPI and ACS Style

Hong, S.; Ozaki, H.; Watanabe, K.; Asai, T. Aerodynamic Characteristics of New Volleyball for the 2020 Tokyo Olympics. Appl. Sci. 2020, 10, 3256. https://doi.org/10.3390/app10093256

AMA Style

Hong S, Ozaki H, Watanabe K, Asai T. Aerodynamic Characteristics of New Volleyball for the 2020 Tokyo Olympics. Applied Sciences. 2020; 10(9):3256. https://doi.org/10.3390/app10093256

Chicago/Turabian Style

Hong, Sungchan; Ozaki, Hiroki; Watanabe, Keita; Asai, Takeshi. 2020. "Aerodynamic Characteristics of New Volleyball for the 2020 Tokyo Olympics" Appl. Sci. 10, no. 9: 3256. https://doi.org/10.3390/app10093256

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