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Mechanical Engineering QUESTION #2402
Question 1
The Reynolds number \(Re\) is the ratio of inertial forces to viscous forces, defined for pipe flow as:
  • \(Re = \mu V D / \rho\)
  • \(Re = \rho V D / \mu = V D / \nu\)✔️
  • \(Re = \rho V^2 / \mu\)
  • \(Re = \rho g D / \mu V\)
Correct Answer Explanation
Reynolds number: \(Re=\rho VD/\mu=VD/\nu\). For pipe flow: laminar if \(Re<2300\), transitional \(23004000\).