Froude Number Calculator

The Froude number (Fr) is a dimensionless quantity used in fluid mechanics to describe the behavior of a fluid flow around an object or within a channel. The Froude number is defined as the ratio of the flow velocity (V) to the square root of the product of the gravitational acceleration (g) and a characteristic length or chord length (c) of the flow. 

  • Fr = Froude number (dimensionless)
  • V = Flow velocity (in m/s or ft/s)
  • g = Acceleration due to gravity (in m/s² or ft/s²)
  • c = Characteristic length or chord length (in meters or feet)

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