Unraveling the near vicinity pressure field of a transversely spinning cricket ball

Abstract

We report an experimental study on the pressure field changes caused by the transverse spinning of a cricket ball in a wind tunnel. The study focuses on modern cricket techniques where bowlers deliver the ball with near-horizontal arms. Using a wake survey rake pressure measurement system and simultaneous traversal-imaging methodology, the study investigates pressure changes at constant Reynolds number and varying spin parameters. Key findings include the expansion and intensification of low-pressure zones near the ball when spin is applied, with these zones shifting and diminishing downstream. At higher spin rates, a persistent bi-lobed low-pressure zone is observed. The results align with Magnus effect theories and provide valuable insights for improving unconventional bowling techniques in cricket.