Sports ball aerodynamics: A numerical study of the erratic motion of soccer balls

Article English OPEN
Barber, S. ; Chin, S.B. ; Carré, M.J. (2009)
  • Publisher: Elsevier

The application of the commercial CFD code, FLUENT, to sports ball aerodynamics was assessed and a validated 3D analysis technique was established for balls that have been scanned with a 3D laser scanner or drawn in CAD. The technique was used to examine the effects of surface geometry on the aerodynamic behaviour of soccer balls by comparing the flow around different balls and predicting the aerodynamic force coefficients. The validation process included performing CFD studies on 3D smooth spheres and various soccer balls, and comparing the results to wind tunnel tests and flow visualisation. The CFD technique used a surface wrapping meshing method and the Reynolds Averaged Navier-Stokes approach with the realizable k-ε turbulence model, which was found to be able to predict the drag, lift and side force coefficients (C<sub>D</sub>, C<sub>L</sub> and C<sub>S</sub>) reliably, to compare the wake behaviour, and to give good pressure distributions near the stagnation point. The main limitations of the technique with the available computational resources were its inability to accurately predict boundary layer transition or growth, but despite this, several conclusions could be drawn regarding soccer ball aerodynamics. C<sub>D</sub> was not significantly different between balls. C<sub>L</sub> and C<sub>S</sub> were found to be significantly affected by the orientation of the ball relative to its direction of travel, meaning that balls kicked with low amounts of spin could experience quasi-steady lift and side forces and move erratically from side-to-side or up and down through the air. For different balls, C<sub>D</sub>, C<sub>L</sub> and C<sub>S</sub> were predicted and their variation with orientation entered into a modified trajectory simulation program. The erratic nature of this type of kick was found to vary with details of the surface geometry including seam size, panel symmetry, number, frequency and pattern, as well as the velocity and spin applied to the ball by the player. Exploitation of this phenomenon by players and ball designers could have a significant impact on the game. © 2008 Elsevier Ltd. All rights reserved.
  • References (17)
    17 references, page 1 of 2

    Achenbach E, Experiments on the flow past spheres at very high Reynolds numbers. Journal of Fluid Mechanics, 1972. 54: p. 565-575.

    Journal of Fluid Mechanics, 1974. 65: p. 113-125.

    3. Taneda S, Visual observations on the flow past spheres at Reynolds numbers between 104 and 106. Journal of Fluid Mechanics, 1978. 85: p. 187-192.

    4. Jindal S, Long LN, Plassmann PE, and Sezer-Uzol N, Large-eddy simulations around a sphere using unstructured girds. AIAA Paper 2228.

    Constantinescu GS, Chapelet M, and Squires KS, Turbulence modelling applied to flow over a sphere. AIAA Journal, 2003. 41 (9): p. 1733-1743.

    6. Penrose JMT, Hose DR, and Trowbridge EA. Cricket ball swing: a preliminary analysis using CFD. in The Engineering of Sport. 1996. Sheffield, UK: AA Balkema.

    Journal of Flow Visualisation, 2001. 4: p. 197.

    8. Ting LL. Application of CFD technology analysing the 3D aerodynamic behaviour of dimpled golf balls. in ASME International Mechanical Engineering Congress and Exposition. 2002. New Orleans, Louisiana, USA.

    9. Ting LL. Effect of teardrop shaped dimple design on the golf ball aerodynamic performance. in ISEA 5th Engineering of Sport Conference. 2004. Davis, California: International Sports Engineering Association.

    10. Ting LL. Golf ball aerodynamic behaviour as affected by the dimple depth and dimple shape changes. in Asia-Pacific Congress on Sports Technology. 2005. Tokyo, Japan: Australasian Sports Technology Alliance.

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