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Transcript of GE60 20C
sepak means "kick" in Bahasa Melayu
takraw which means "ball" or "woven ball" in Thailand language
Two teams consist of three player each using only all limbs except hand to control ball
exhange ball within 3 contacts
lift-the force on balls which are directed perpendicular to the ball's trajectory
drag-force in the opposite direction of the ball's flight path(Kensrud & Smith)
Kensrud JR and Smith LV. In situ lift measurement of sports balls. Procedia Engineering. 2011; 13: 278-83.
Barber S, Haake SJ and Carré M. Using CFD to understand the effects of seam geometry on soccer ball aerodynamics. The Engineering of Sport 6. 2006: 127-32.
Haake S, Goodwill S and Carre M. A new measure of roughness for defining the aerodynamic performance of sports balls. Proceedings of the Institution of Mechanical Engineers, part C: Journal of mechanical engineering science. 2007; 221: 789-806.
Seo K, Shibata M. Aerodynamic characteristics of a sepak takraw ball on its face orientation. The Impact of technology on Sport III 2009: 372-82.
To investigate the aerodynamic properties of Sepak Takraw ball such as drag and lift coefficient using Computational Fluid Dynamic(CFD) analysis
To conduct wind tunnel experiment to obtain aerodynamic properties such as drag and lift
To compare and analyse different aerodynamic results for different orientations of Sepak Takraw ball model
To compare and analyse the CFD analysis results and wind tunnel results.
different orientation and speed
flow visualization, drag and lift result
Wind tunnel experiment:
sepak takraw ball mounted with force sensor
drag, lift and side force recorded
ABDUL SYAKIR BIN ABDUL MUBIN
MATRIC NO :
DR AZUDDIN MAMAT
Literature study from existing aerodynamic of sports balls with relation of sepak takraw ball
Run CFD analysis of the sepak takraw ball for different position and speed
Set up the geometrical and material properties of sepak takraw ball
Run wind tunnel sepak takraw model for different position
ANALYSIS & FINAL SUBMISSION
Compiling data analysis acquire from all CFD analysis and final documentation
Preliminary CFD analysis
factors affecting the flight trajectory of sepak takraw ball
Lack of information on aerodynamic parameter of sepak takraw ball in literature
factors affecting aerodynamic
geometry(Barber, Haake & Carre)
velocity(Haake, Goodwill & Carre)
orientation( Seo & Shibata)
focus on different orientation
speed velocity range between 5m/s to 30m/s
CFD analysis focus on static ball only
The modern takraw ball is made by interwoven plastic strip hoop intertwine into a spherical shape
Traditional ball made of rattan
These interwoven hoops form 12 pentagon holes and 30 intersections for modern ball
FLOW CHART ACTIVITIES