# Fluid Mechanics

- Hydraulic Radius for a Channel - The hydraulic radius for a channel is a crucial parameter in fluid mechanics, representing the ratio of the cross-sectional area to the wetted perimeter. It influences flow velocity and resistance.
- Strouhal Number in Fluid Mechanics - The Strouhal number (St) is a dimensionless quantity in fluid mechanics describing oscillating flow mechanisms. The Strouhal number calculator provides the value based on vortex shedding frequency, characteristic length, and flow speed.