Question

Which among the following is the correct format for Rayleigh’s method?

(a) D = f(l,ρ,μV,g)

(b) D = (l,ρ,μV,g)

(c) D = f

(d) D = f(lpv)

I had been asked this question in an interview.

My question is taken from Rayleighs Method topic in portion Dimensional and Model Analysis of Fluid Mechanics

Answer 1

Right choice is (a) D = f(l,ρ,μV,g)

For explanation: The correct format for Rayleigh’s method is D = f(l,ρ,μV,g). Where, D is the dimensional analysis, ‘f’ is the function, and the variables inside the bracket are the physical parameters to determine the function.