Aerodynamic study of a modern sepak takraw ball using smoke flow visualization technique
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Kementerian Pendidikan Tinggi (KPT), Malaysia
2018
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my.unimap-519182018-02-27T07:23:15Z Aerodynamic study of a modern sepak takraw ball using smoke flow visualization technique Abdul Syakir, Abdul Mubin Norhafizan, Ahmad Aerodynamics Drag Flow visualization Sepak Takraw Link to publisher's homepage at http://www.mohejournal.com/index.php/mohe It has been shown in previous studies that the flight trajectories of sports balls are influenced by their aerodynamic characteristics. These aerodynamic characteristics are primarily dependent on the physical shape and surface texture of the balls. Even though sepak takraw is well established as a sport, little is known regarding the aerodynamic characteristics of the sepak takraw ball, which has a rather complex shape and surface texture. Hence, the main objective of this research is to investigate the aerodynamic characteristics (specifically the drag and lift coefficients) and flow features of a modern sepak takraw ball commercially available in the market by means of numerical simulations and wind tunnel experiments using the smoke flow visualization technique. The aerodynamic characteristics and flow features of the ball are determined for non-spinning conditions at a wind speed of 3 m/s. It is found that the drag coefficient and lift coefficient of the sepak takraw ball is 0.4868400 and -0.0130915, respectively. The images captured from the smoke flow visualization experiments reveal that the sepak takraw ball is in the subcritical flow regime at a wind speed of 3 m/s, which is the regime before the drag crisis. The laminar boundary layer separates from the upper and lower surfaces of the ball at points upstream of the equator of the ball, creating a large wake region downstream of the sepak takraw ball and resulting in high drag. This in turn, influences the trajectory of the sepak takraw ball in flight. The flow features observed from the smoke flow visualization experiments are representative of the flow during a sepak takraw game. Owing to the complexity of sepak takraw ball, it is recommended that the aerodynamic characteristics of the sepak takraw ball are investigated for spinning conditions in future studies. 2018-02-27T07:23:15Z 2018-02-27T07:23:15Z 2015 Article Movement, Health & Exercise (MoHE), vol.4(2), 2015, pages 19-30 2231-9409 (Print) 2289-9510 (Online) http://dspace.unimap.edu.my:80/xmlui/handle/123456789/51918 http://www.mohejournal.com/index.php/mohe en Kementerian Pendidikan Tinggi (KPT), Malaysia |
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English |
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Aerodynamics Drag Flow visualization Sepak Takraw |
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Aerodynamics Drag Flow visualization Sepak Takraw Abdul Syakir, Abdul Mubin Norhafizan, Ahmad Aerodynamic study of a modern sepak takraw ball using smoke flow visualization technique |
| description |
Link to publisher's homepage at http://www.mohejournal.com/index.php/mohe |
| format |
Article |
| author |
Abdul Syakir, Abdul Mubin Norhafizan, Ahmad |
| author_facet |
Abdul Syakir, Abdul Mubin Norhafizan, Ahmad |
| author_sort |
Abdul Syakir, Abdul Mubin |
| title |
Aerodynamic study of a modern sepak takraw ball using smoke flow visualization technique |
| title_short |
Aerodynamic study of a modern sepak takraw ball using smoke flow visualization technique |
| title_full |
Aerodynamic study of a modern sepak takraw ball using smoke flow visualization technique |
| title_fullStr |
Aerodynamic study of a modern sepak takraw ball using smoke flow visualization technique |
| title_full_unstemmed |
Aerodynamic study of a modern sepak takraw ball using smoke flow visualization technique |
| title_sort |
aerodynamic study of a modern sepak takraw ball using smoke flow visualization technique |
| publisher |
Kementerian Pendidikan Tinggi (KPT), Malaysia |
| publishDate |
2018 |
| url |
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/51918 |
| _version_ |
1643803372950650880 |