Reynolds Number

Reynolds number (Re) is an experimental number used to predict the flow velocity in fluid flow at which turbulence will occur. It is a non-dimensional velocity can be defined as the ratio of a fluid’s inertia force to the viscous forces.

Reynolds number formula

Where,
ρ = mass density of the fluid,
v = Velocity of the fluid,
L = The characteristic linear dimension, (traveled length of the fluid; hydraulic diameter when dealing with river systems),
μ = Dynamic viscosity of the fluid,
v = Kinematic viscosity of the fluid.

Reynolds number is used to determine whether a flow of a fluid will be laminar, turbulent or transitional flow. Below a critical Reynolds number, flow will be laminar. Above a critical Reynolds number, flow will be turbulent.

https://me-mechanicalengineering.com/about-us/

'ME Mechanical' is an online portal for mechanical engineers and engineering students. We have published hundreds of articles on various engineering topics. Visit our about section to know more.

All Comments

  • Good and helpful website

    lekan Apr 19, 2016 11:24 pm Reply
  • NICE

    KRISH Aug 23, 2016 6:22 pm Reply

Leave a Comment

Your email address will not be published. Required fields are marked *