Question

Length, Scale and Volume fall under which of the following flow similarity?

(a) Geometric Similarity

(b) Kinematic Similarity

(c) Dynamic Similarity

(d) Dimensionless number

I had been asked this question in an interview for internship.

My question comes from Infinitesimal Fluid Element in division Aerodynamics – Fundamental Principles and Equations of Aerodynamics

Answer 1

The correct choice is (a) Geometric Similarity

The explanation is: Geometric similarity occurs when the model and prototype have same dimensional ratio in each direction. These ratios are called as scale ratio. For ex, Length scale ratio Lr = Lm/Lp where, m and p represent model and prototype.