How does a cricket ball swing. Explain using fluid mechanics.

Question

Accepted Answer

A cricket ball swings due to the asymmetrical airflow around it caused by the seam position and surface roughness.

Swing is caused by the ball creating turbulent airflow around it due to its seam position and surface roughness.
The rough side of the ball creates more drag, causing it to swing towards that side.
The Magnus effect also plays a role in swing, where the ball's spin creates a pressure difference leading to movement in the air.
Fluid mechanics principles such as Bernoulli's principle and boundary layer separation contribute to the swing of a cricket ball.

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