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The Scruton number Sc is one of the important parameters for vortex-induced vibration of structures, vibrations caused by rain or wind, dry inclined cable galloping dry and wake galloping. It is named after Christopher "Kit" Scruton, a British industrial dynamics engineer.
It is defined by:
is the structural damping expressed by the logarithmic damping decrement, is the effective mass per unit length, is the density of the air, or liquid, is the characteristic width of the structure.
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