Wind blowing over the cables of a bridge sheds alternating vortices resulting in oscillating forces acting on the cables. Which of the major parameters are the primary parameters which would be used in the description of this situation?
(A) Re and St
(B) Fr and St
(C) St and M
(D) Re and M
(A) Re and St
The shedding of the vortices would involve a shedding frequency leading to the Strouhal number. The force of the wind on a cable would depend on the Reynolds number. The flow would not be compressible so the Mach number would not enter. Gravity would also not enter the problem so the Froude number would not enter.
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