Topic: Fluid Mechanics
Which of the following is the correct definition of the Reynolds number? Where rho = fluid density, U = velocity, L = Length and mu = Kinematic viscosity
- A. rho * U * L / mu
- B. rho * U * L / mu²
- C. U * L / mu
- D. rho * U * L² / mu
Answer: C. U * L / mu
Explanation: Typically, Reynolds number is Re = (rho * U * L) / (dynamic viscosity). However, the question specifies that 'mu' represents 'Kinematic viscosity' (which is usually denoted by nu). Since kinematic viscosity is dynamic viscosity divided by density, the formula reduces to Re = (U * L) / mu.