The Strouhal number is a dimensionless quantity used to describe oscillating flow mechanisms, defined as the ratio of inertial forces to the flow's frequency and characteristic length. It plays a crucial role in understanding various fluid dynamics phenomena, particularly in the context of vortex shedding and the behavior of objects moving through a fluid. The Strouhal number helps to characterize flow regimes and is often used in conjunction with the Buckingham Pi Theorem to analyze fluid systems.
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