Influence of Surface Properties on Soccer Ball Trajectories

Goff, John Eric; Hong, Sungchan; Asai, Takeshi

doi:10.3390/proceedings2020049143

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…Telah ditentukan bahwa bilangan reynolds kritis berkorelasi lebih kuat dengan lebar jahitan bola dibandingkan dengan kedalaman jahitannya. Informasi ini akan membantu produsen bola dalam mendesain bola baru yang memiliki sifat aerodinamis yang mirip dengan bola yang biasa digunakan pemain (Goff et al, 2020).…”

Section: Pendahuluanunclassified

Struktur Permukaan 5 Merk Bola Sepak dan 5 Merk Bola Voli

Bayu Septa Martaviano Triaiditya,

Gatut Rubiono,

Edi Irwanto

et al. 2023

spr

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Material dan teknik pembuatan bola menentukan permukaan bola. Permukaan bola berpengaruh terhadap performansi bola dimana hal ini terkait dengan aspek aerodinamika yaitu perilaku bola di udara sekitar. Permukaan bola berpengaruh terhadap gerak bola di udara. Penelitian ini bertujuan untuk menganalisis struktur permukaan 5 merk bola sepak dan 5 merk bola voli. Lima merk bola sepak meliputi Adidas champion, Adidas telstar, Mikasa squadra, Nike academy, dan Padova. Lima merk bola voli meliputi Apollo, Nassau, Mikasa competition, Mikasa gold, Mikasa MG. Penelitian dilakukan dengan pengamatan permukaan bola menggunakan mikroskop digital USB dengan pembesaran 1600 kali. Pengolahan data dilakukan menggunakan aplikasi ImageJ versi 1.53k. Foto mikroskop di-crop untuk mendapatkan foto dengan ukuran 1 x 1 mm dan dikonversi dalam mode abu-abu 8 bit. Foto abu-abu ini selanjutnya digunakan untuk mendapatkan struktur permukaan dengan menggunakan metode plot surface. Hasil penelitian menunjukkan bahwa terdapat perbedaan struktur permukaan 5 merk bola sepak dan 5 merk bola voli.

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Section: Pendahuluanunclassified

Struktur Permukaan 5 Merk Bola Sepak dan 5 Merk Bola Voli

Bayu Septa Martaviano Triaiditya,

Gatut Rubiono,

Edi Irwanto

et al. 2023

spr

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show abstract

“…Other studies [13,14] evaluated and assessed the variations on aerodynamics and flight properties due to changes in the panel orientation that are attributed to the reduced number of panels. Research on how the number of panels, shape of surface structures (convexity and concavity), and surface design (such as protrusions) of modern soccer balls affect their aerodynamic properties have been published [15].…”

Section: Introductionmentioning

confidence: 99%

The Aerodynamics of New Design Soccer Balls Using a Three-Dimensional Printer

Hong,

Goff,

Asai

2024

Applied Sciences

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Eight balls were manufactured with a 3D printer to resemble various types of 32-panel soccer balls. One ball was completely smooth, whereas the other seven possessed various dimple patterns on their surface panels. Seam width and seam depth were also varied. Wind-tunnel experiments were performed to extract aerodynamic coefficients, and also to determine the critical Reynolds number for each manufactured ball. A new surface roughness parameter is introduced, and a fitting formula is presented, which allows for the prediction of the critical Reynolds number if the new parameter is known.

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“…Studies on the effects of the panel orientation variations, owing to the number of panels reduction, on the aerodynamics and flight trajectories of the soccer balls have also been published [14][15][16][17][18]. In modern soccer balls, not only the number of panels but also the surface roughness (bumps and dimples) significantly change, substantially affecting the ball aerodynamics [1,[19][20][21][22]. Additionally, depending on the type of soccer ball and its producer, the material used for the ball surface varies considerably.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Differences between New and Used Soccer Balls

Hong

Asai

2021

Applied Sciences

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The surface structure of soccer balls, such as the number and shapes of the ball panels, has recently changed, and research on the aerodynamics and flight trajectories of new soccer balls is actively proceeding. However, these studies are focused on new soccer balls, whereas the used soccer balls were never studied. In this study, the aerodynamic characteristics of soccer balls kicked 1000 times by a robot were investigated through wind tunnel tests. The results were compared with those obtained using new soccer balls. Regarding the aerodynamic characteristics of the soccer balls, it was found that the critical Reynold number, Recrit, changes with usage. This is related to the transition from laminar to turbulent flow of airflow around the ball. The comparison of the drag coefficients of the balls at Recrit showed that the drag coefficients of the new and used Telstar18 balls were 0.15 (Re = 2.5 × 105) and 0.14 (Re = 2.2 × 105), respectively; those of the new and used Merlin were 0.13 (Re = 2.8 × 105) and 0.13 (Re = 2.2 × 105), respectively; and finally, those of the new and used Derbystar were 0.14 (Re = 2.1 × 105) and 0.14 (Re = 2.1 × 105), respectively. The surface conditions of a soccer ball, such as the surface roughness and surface damages, are essential factors to determine the aerodynamics of the soccer balls.

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Influence of Surface Properties on Soccer Ball Trajectories

Cited by 4 publications

References 10 publications

Struktur Permukaan 5 Merk Bola Sepak dan 5 Merk Bola Voli

Struktur Permukaan 5 Merk Bola Sepak dan 5 Merk Bola Voli

The Aerodynamics of New Design Soccer Balls Using a Three-Dimensional Printer

Aerodynamic Differences between New and Used Soccer Balls

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