Uses
The Froude number is used to compare the wave making resistance between bodies of various sizes and shapes.
In free-surface flow, the nature of the flow (supercritical or subcritical) depends upon whether the Froude number is greater than or less than unity.
The Froude number has been used to study trends in animal locomotion in order to better understand why animals use different gait patterns as well as to form hypotheses about the gaits of extinct species.
Froude number scaling is frequently used in construction of dynamically similar free-flying models in which lift = weight. Since these models oppose gravity, their linear accelerations at model scale match those of full-size aircraft.
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