HOW TO SWINGA
If you've used the SWINGA, you may notice that the ball will tend to swing away from the shiny side (conventional swing) when it is thrown or bowled at a slower pace, but swing towards the shiny side (reverse swing) when bowled or thrown at a higher pace. I'm no physicist, so when creating the SWINGA I wanted to understand the physics of this behaviour.
So I reached out to my good friend Dr Callum Shakespeare (PhD (Cambridge 2015), BSc Hons (ANU 2011), BSc (UWA 2010)) who is a fellow/senior lecturer at the Australian National University and has worked with the Climate and Fluid Physics Research Group since 2015.
He has shared some thoughts on why the ball behaves the way it does:
throw it slowly, laminar drag dominates, and ball moves towards rough side.Throw it fast, turbulent drag dominates, and ball moves towards the smooth side."
There was also a great study done by Rabindra Mehta (sports aerodynamics consultant and NASA scientist) explaining the three forms of swing: conventional, reverse and contrast. This also may explain why the ball behaves the way it does - which is pretty cool!
Click here to view the study.