UIJRT » United International Journal for Research & Technology

The Aerodynamics of a Diabolo

Total Views / Downloads: 20 

Cite ➜

Jia, D., 2021. The Aerodynamics of a Diabolo. United International Journal for Research & Technology (UIJRT), 2(11), pp.98-103.

Abstract

Diabolo is a popular game in which the object can be spun at speeds of up to 5000 rpm. This high spin velocity gives the diabolo the necessary angular momentum to remain stable. The shape of the diabolo generates an interesting airflow pattern. The viscous air applies a resistive torque on the fast-spinning diabolo. Through computational fluid dynamics (CFD) simulations it’s shown that the resistive torque has an interesting dependence on the angular speed of the diabolo. Further, the geometric shape of the diabolo affects the dependence of torque on angular speed.

Keywords: aerodynamics, diabolo, air flow, computational fluid dynamics, CFD.

References

  1. Kim HC, et al,” Three-dimensional flow analy¬sis around a cylinder with dimples”, Asia-Pacific congress on sports technology, 2005
  2. Archenbach E.,” Experiments on the flow past spheres at very high Reynolds numbers”, J Fluid Mech 54, 1972, 565-75
  3. Taneda S., ”Visual observations on the flow past spheres at Reynods numbers between 104 and 106”, J Fluid Mech., 85, 1978, 187-92
  4. Constantinescu GS, et al, ”Turbulence modelling ap¬plied to flow over a sphere”, AIAA J, 41(9), 2003, 1733-43
  5. Penrose JMT, et al, ”Cricket ball swing: a prelimi¬nary analysis using CFD” The engineering of sport, Sheffield, UK, 1996
  6. TIng LL., ”Application of CFD technology analysing the 3D aerodynamic behavior of dimpled golf balls”, ASME international mechanical engineer¬ing congress and exposition, 2002, New Orleans, Louisiana.
  7. Ting LL., ”Effect of teardrop shaped dimple design on the golfball aerodynamic performance”, ISEA 5th engineering of sport conference, 2004, International Sports Engineering Association.
  8. Aoki K, et al, ”Effect of the dimple structure on the flying characteristics and flow patterns of a golf ball”, 2004 ”ISEA 5th engineering of sport confer¬ence. International Sports Engineering Association.
  9. Carre MJ, et al, ”The curve kick of a football 2: flight through the air”, Sports Eng., 5, 2002, 183-92
  10. Barber S., ”The aerodynamics of association footballs”, Mechanical engineering, University of Sheffield, 2007
  11. Barber S.,et al, ”Sports ball aerodynamics: A nu¬merical study of the erratic motion of soccer balls”, Computers & Fluids, 38, (2009) 1091-100
  12. Asai T., et al, ”A fundamental study on aerody¬namics of soccer ball”, Proceedings of 83rd Japan society of mechanical engineering conference (Fluid engineering division), 2005
  13. Jasak H., ”Error Analysis and Estimation for the Finite Volume Method with applications to Fluid Flows”, Direct, M
  14. K. Versteeg and W. Malalasekera, An Introduc¬tion to Computational Fluid Dynamics: The Finite Volume Method Longman Scientific and Technical, 1995.
  15. H. Ferziger and M. Peric’, Computational Meth¬ods for Fluid Dynamics Springer, Berlin, 1996.

For Conference & Paper Publication​

UIJRT Publication - International Journal