Surface Patterns for Drag Modification in Volleyballs

Hong, Sungchan; Asai, Takeshi; Weon, Byung Mook

doi:10.3390/app9194007

Cited by 6 publications

(8 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Subsequently, a volleyball with a raised hexagon-shaped design on the surface (V5M5000 by Molten) was introduced in 2008 and has been adopted as the official ball by the NCAA (National Collegiate Athletic Association) Volleyball tournament and the USA Volleyball. The aerodynamic characteristics of these balls, having significantly different shapes and surface textures from those of traditional volleyballs, have been studied previously using wind-tunnel experiments [1][2][3]. Moreover, wind-tunnel experiments and CFD tests on various sports balls have been performed in previous studies [4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Characteristics of New Volleyball for the 2020 Tokyo Olympics

Hong¹,

Ozaki

Watanabe

et al. 2020

Applied Sciences

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

Aerodynamic Characteristics of New Volleyball for the 2020 Tokyo Olympics

Hong¹,

Ozaki

Watanabe

et al. 2020

Applied Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…Hal ini senada dengan (Jalilian, 2014) yang menyatakan pengembangan sarana olahraga didasari dari pemahaman yang tumbuh pada perkembangan ilmu fisika yang dapat menjelaskan fenomena bagaimana olahraga tersebut dimainkan. Beberapa peneltian tentang bola voli yang sudah dilakukan diantaranya oleh (Asai et al, 2010), (Hong et al, 2018), (Hong et al, 2019), (Fitria & Suminah, 2020), (Irwanto et al, 2021).…”

Section: Pendahuluanunclassified

Bolavoli: Kecepatan Laju Bola Berdasarkan Bentuk Panel

Safitri

Irwanto

Mislan

et al. 2022

spr

View full text Add to dashboard Cite

Bentuk dan jumlah panel bola dari waktu kewaktu terus mengalami perubahan. Perubahan tersebut tentu memiliki maksut dan tujuan tertentu salah satunya adalah kecepatan laju bola. Oleh karena itu, penelitian ini bertujuan untuk mengetahui kecepaatan bola berdasarkan perbedaan bentuk dan jumlah panel yang digunakan. Penelitian ini merupakan penelitian ex-post facto dengan menggunakan metode kuantitatif. Pengambilan data dilakukan dengan menggunakan tes bola jatuh untuk mengetahui kecepatan bolavoli. Sampel yang digunakan dalam penelitian ini adalah bolavoli jenis Mikasa MV2200, Mikasa MVA200, Mikasa V330W, Molten V5MP4200, Nassau Patriot, Nassau Premium3000, dan Proteam V5P8000. Analisis data yang digunakan yaitu deskriptif kuantitatif dengan menggunakan aplikasi kinovea 08.15. Hasil analisis data disajikan dalam bentuk tabel dan grafik. Hasil penelitian menyatakan bahwa kecepatan bola tidak hanya dipengaruhi berat pada bola, tetapi bentuk panel pada setiap bola juga mempengaruhi lanju kecepatan bola. Laju bola yang paling cepat adalah Mikasa V330W dengan bentuk panel lesung pipi yang berjumlah 18 panel dengan kecepatan 3,53 m/s, sedangkan jenis bola yang memilki laju paling lambat adalah Nassau Patriot dengan bentuk panel segienam yang berjumlah 18 panel dengan kecepatan 4,70 m/s.

show abstract

“…Since each panel was measured only five times, it cannot be said to be a statistically sufficient amount, but it was found that there is a difference in the variability of each ball and panel. In the previous fluid force measurement using a wind tunnel [7,11], the magnitude of the force applied to the ball varied with time, and it was reported that some panels had large amplitudes while others had small amplitudes. The results of the present study, which show that the variation in the drop point varies from panel to panel, are consistent with the previous result, indicating that the blurring of the floater serve varies from panel surface to panel surface.…”

Section: Ejection Experimentsmentioning

confidence: 99%

“…The fluid force on the ball has been investigated in wind tunnel experiments [5,6], with a hitting robot [7], and computational calculations [8][9][10]. The drag coefficient applied to the ball is large at low velocities, and decreases drastically with the transition from laminar to turbulent flow as the speed of the ball increases.…”

Section: Introductionmentioning

confidence: 99%

“…However, the drag coefficient measurements of the ball surface fixed in the wind tunnel is not sufficient to describe the trajectory of the ball, because the speed of the ball decelerates during flight and the force applied to the ball changes irregularly. For a more detailed understanding, it is necessary to serve a large number of balls under the same conditions to clarify the relationship between actual flight and wind tunnel measurements [7]. We are also interested in how much the actual trajectory of the ball is affected when a person serves the ball while paying attention to the panel surface.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Serve Ball Trajectory Characteristics of Different Volleyballs and Their Causes

2021

View full text Add to dashboard Cite

A floater serve in volleyball is a technique of serving a non-rotating or low-rotating ball, which is difficult to return because the flight path of the ball changes irregularly. On the other hand, the randomness of the trajectory makes it difficult for the ball to fall on the target. Players are required to serve taking into account the variability of the trajectory. In previous studies using wind tunnels, it was shown that aerodynamic characteristics such as drag force and lateral force applied to the ball vary depending on the type of ball and the orientation of the panel. Therefore, in order to control the flight trajectory, it is necessary to understand the aerodynamic characteristics of each ball. Since the velocity of the ball and the fluid force applied to the ball changes during flight, it is important to measure not only the fluid force at a steady state in the wind tunnel but also the actual flight distance of the ball. In this study, to provide valuable information for precise control of floater serves, we measured the drag force applied to the ball in a wind tunnel and the flight distance of the ball using an ejection machine, and clarified the effects of the type of ball and the panel face. In the drag force measurement, the drag force on three types of balls, V200W, MVA200, and FLISTATEC, was measured in the wind speed range of 4 m/s to 30 m/s. In the ejection measurement, the ball flight distances were measured while changing the orientation of the panel using an ejection machine. Basically, the FLISTATEC, MVA200, and V200W, in that order, were more likely to increase the distance and the variability, but it was shown that the drop point could be adjusted slightly by selecting the panel face. This result was also obtained when a human player actually served the ball, indicating the tactical importance of the player consciously controlling the direction of the panel. The tactical importance of the player’s conscious control of the direction of the panel was demonstrated. We also proposed receiver positions that would be effective based on the characteristics of each ball.

show abstract

Surface Patterns for Drag Modification in Volleyballs

Cited by 6 publications

References 35 publications

Aerodynamic Characteristics of New Volleyball for the 2020 Tokyo Olympics

Aerodynamic Characteristics of New Volleyball for the 2020 Tokyo Olympics

Bolavoli: Kecepatan Laju Bola Berdasarkan Bentuk Panel

Serve Ball Trajectory Characteristics of Different Volleyballs and Their Causes

Contact Info

Product

Resources

About