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Abstract
Five different soccer balls, each possessing the traditional 32-panel surface design, were tested in a wind tunnel. Only seam depth and width varied between the balls. Wind-tunnel tests and an examination of correlation revealed that seam width with a linear fit and was a stronger indicator of a ball’s critical speed than seam depth. Wind-tunnel data were used for computational modeling of many soccer-ball trajectories. It was determined that variations in seam geometry resulted in fluctuations up to 4 m in the horizontal range of hard-hit, no-spin kicks that travel approximately 68 m. Those seam geometry variations also contributed to lateral deflections up to 4 m for the aforementioned hard-hit, no-spin kicks.
References
| 1. |
Hong, S, Goff, JE, Asai, T. Effect of a soccer ball’s surface texture on its aerodynamics and trajectory. Proc IMechE, Part P: J Sports Engineering and Technology 2019; 233: 67–74. Google Scholar | SAGE Journals | ISI |
| 2. |
Goff, JE. Power and spin in the beautiful game. Phys Today 2011; 63: 62–63. Google Scholar | Crossref |
| 3. |
Goff, JE. A review of recent research into aerodynamics of sport projectiles. Sports Eng 2013; 16: 137–154. Google Scholar | Crossref |
| 4. |
White, FM. Fluid mechanics. 7th ed. New York: McGraw Hill, 2011. Google Scholar |
| 5. |
Goff, JE, Carré, MJ. Trajectory analysis of a soccer ball. Am J Phys 2009; 77: 1020–1027. Google Scholar | Crossref | ISI |
| 6. |
Goff, JE, Carré, MJ. Soccer ball lift coefficients via trajectory analysis. Eur J Phys 2010; 31: 775–784. Google Scholar | Crossref | ISI |
| 7. |
Goff, JE, Carré, MJ. Investigations into soccer aerodynamics via trajectory analysis and dust experiments. Procedia Eng 2012; 34: 158–163. Google Scholar | Crossref |
| 8. |
Goff, JE, Kelley, J, Hobson, CM, et al. Creating drag and lift curves from soccer trajectories. Eur J Phys 2017; 38(4): 044003. Google Scholar | Crossref |
| 9. |
Barber, S, Carré, MJ. The effect of surface geometry on soccer ball trajectories. Sports Eng 2010; 13: 47–55. Google Scholar | Crossref |
| 10. |
Goff, JE, Smith, WH, Carré, MJ. Football boundary-layer separation via dust experiments. Sports Eng 2011; 14: 139–146. Google Scholar | Crossref |
| 11. |
Hong, S, Asai, T, Seo, K. Visualization of air flow around soccer ball using a particle image velocimetry. Sci Rep 2015; 5: 15108. Google Scholar | Crossref | Medline |
| 12. |
Crabill, J, Witherden, F, Jameson, A. High-order computational fluid dynamics simulations of a spinning golf ball. Sports Eng 2019; 22: 9. Google Scholar | Crossref |
| 13. |
Barber, S, Carré, M. Soccer ball aerodynamics. In: Peters, M (ed.) Computational fluid dynamics for sport simulation (Lecture Notes in Computational Science and Engineering), Vol. 72. Berlin: Springer, 2009, pp.83–102. Google Scholar | Crossref |
| 14. |
Barber, S, Haake, SJ, Carré, M. Using CFD to understand the effects of seam geometry on soccer ball aerodynamics. In: Moritz, EF, Haake, S (eds) The engineering of sport 6, Vol. 2. New York: Springer, 2006, pp.127–132. Google Scholar | Crossref |
| 15. |
Price, DS, Jones, R, Harland, AR. Computational modelling of manually stitched soccer balls. Proc IMechE, Part L: J Materials: Design and Applications 2006; 220: 259–268. Google Scholar | SAGE Journals | ISI |
| 16. |
Price, DS, Jones, R, Harland, AR. Advanced finite-element modelling of a 32-panel soccer ball. Proc IMechE, Part C: J Mechanical Engineering Science 2007; 221: 1309–1319. Google Scholar | SAGE Journals | ISI |
| 17. |
Rezaei, A, Verheist, R, Van Paepegem, W, et al. Finite element modelling and experimental study of oblique soccer ball bounce. J Sport Sci 2011; 29: 1201–1213. Google Scholar | Crossref | Medline | ISI |
| 18. |
Allen, T, Ibbitson, J, Haake, S. Spin generation during an oblique impact of a compliant ball on a non-compliant surface. Proc IMechE, Part P: J Sports Engineering and Technology 2011; 226: 86–95. Google Scholar |
| 19. |
Asai, T, Seo, K, Kobayashi, O, et al. Fundamental aerodynamics of the soccer ball. Sports Eng 2007; 10: 101–109. Google Scholar | Crossref |
| 20. |
Alam, F, Chowdhury, H, Moria, H, et al. A comparative study of football aerodynamics. Procedia Eng 2010; 2: 2443–2448. Google Scholar | Crossref |
| 21. |
Alam, F, Chowdhury, H, Moria, H, et al. Aerodynamics of contemporary FIFA soccer balls. Procedia Eng 2011; 13: 188–193. Google Scholar | Crossref |
| 22. |
Asai, T, Ito, S, Seo, K, et al. Characteristics of modern soccer balls. Procedia Eng 2012; 34: 122–127. Google Scholar | Crossref |
| 23. |
Alam, F, Chowdhury, H, Stemmer, M, et al. Effects of surface structure on soccer ball aerodynamics. Procedia Eng 2012; 34: 146–151. Google Scholar | Crossref |
| 24. |
Myers, T, Mitchell, S. A mathematical analysis of the motion of an in-flight soccer ball. Sports Eng 2013; 16: 29–41. Google Scholar | Crossref |
| 25. |
Choppin, S. Calculating football drag profiles from simulated trajectories. Sports Eng 2013; 16: 189–194. Google Scholar | Crossref |
| 26. |
Lluna, E, Santiago-Praderas, V, Peris-Fajaranés, G, et al. Measurement of aerodynamic coefficients of spherical objects using an electro-optic device. IEEE Trans Instrum Meas 2013; 62: 2003–2009. Google Scholar | Crossref | ISI |
| 27. |
Kray, TK, Franke, J, Frank, W. Magnus effect on a rotating soccer ball at high Reynolds numbers. J Wind Eng Ind Aerod 2014; 124: 46–53. Google Scholar | Crossref | ISI |
| 28. |
Goff, JE, Hobson, CM, Asai, T, et al. Wind-tunnel experiments and trajectory analyses for five nonspinnig soccer balls. Procedia Eng 2016; 147: 32–37. Google Scholar | Crossref |
| 29. |
Goff, JE, Asai, T, Hong, S. A comparison of Jabulani and Brazuca no-spin aerodynamics. Proc IMechE, Part P: J Sports Engineering and Technology 2014; 228: 188–194. Google Scholar | SAGE Journals | ISI |
| 30. |
Goff, JE, Hong, S, Asai, T. Aerodynamic and surface comparisons between Telstar 18 and Brazuca. Proc IMechE, Part P: J Sports Engineering and Technology 2018; 232: 342–348. Google Scholar | SAGE Journals | ISI |
| 31. |
Hong, S, Asai, T. Effect of panel shape of soccer ball on its flight characteristics. Sci Rep 2014; 4: 5068. Google Scholar | Crossref | Medline |
| 32. |
Naito, K, Hong, S, Koido, M, et al. Effect of seam characteristics on critical Reynolds number in footballs. Mech Eng J 2018; 5: 17-00369. Google Scholar | Crossref |
| 33. |
Achenbach, E. Experiments on the flow past spheres at very high Reynolds numbers. J Fluid Mech 1972; 54: 565–575. Google Scholar | Crossref | ISI |
| 34. |
Asai, T, Kamemoto, K. Flow structure of knuckling effects in footballs. J Fluid Struct 2011; 27: 727–733. Google Scholar | Crossref | ISI |
| 35. |
Ito, S, Kamata, M, Asai, T, et al. Factors of unpredictable shots concerning new soccer balls. Procedia Eng 2012; 34: 152–157. Google Scholar | Crossref |
| 36. |
Adair, RK. The physics of baseball. 3rd ed. New York: Harper Perennial, 2002. Google Scholar |
| 37. |
Tracker . https://physlets.org/tracker/ (accessed 12 November 2018). Google Scholar |
| 38. |
Press, WH, Flannery, BP, Teukolsky, SA, et al. Numerical recipes: the art of scientific computing. New York: Cambridge University Press, 1986. Google Scholar |
| 39. |
Achenbach, E. The effects of surface roughness and tunnel blockage on the flow past spheres. J Fluid Mech 1974; 65: 113–125. Google Scholar | Crossref | ISI |
