Question

Reynolds number (Re) is:

  • an experimental number used to predict the flow velocity.
  • a number with certain dimensions
  • a non-dimensional velocity
  • a number which differentiates between types of flows like laminar, turbulent, and transitional.

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Answer

The correct options are:

  1. A - An experimental number used to predict the flow velocity.
  2. C - A non-dimensional velocity.
  3. D - A number which differentiates between types of flows like laminar, turbulent, and transitional.

Reynolds number is an experimental number used to predict the flow velocity in fluid dynamics. It is a non-dimensional quantity defined as the ratio of a fluid's inertia force to its viscous forces. This number is essential for differentiating between types of fluid flow, such as laminar, turbulent, and transitional flows.


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