REYNOLD’S NUMBER
SOLVE FOR
INPUT VALUES
Re

   

ρ

   

v

   

D

   

μ

   

SOLUTION
Re

   

ρ

   

v

   

D

   

μ

   

INFORMATION
VARIABLES
Re – Reynold’s Number (Unitless)
ρ – Density (mass/volume)
L – Length (distance)
V – velocity (speed)
Dh – Hydraulic Diameter (length)

WHAT IS REYNOLD’S NUMBER?

Reynold’s number is the ratio of inertial forces to viscous forces within a fluid of which is subjected to internal movement due to different fluid velocities.

FLOW TYPE

Laminar Flow – Re < 2,300
Transient Flow – 2,300 < Re < 4,000
Turbulent Flow – Re > 4,000