Reynolds number calculator

The Reynolds number is a criterion for the hydrodynamic similarity of a viscous fluid, it reflects the ratio of inertial forces to viscous friction forces.



Calculation of Reynolds number for fluid flow in a round pipe

Enter the flow rate, pipe diameter and kinematic viscosity of the substance (or choose one of the proposed liquids).

Initial data

Velocity of flow: m/s
Pipe diameter: mm, calculator to convert length units from inches, meters
Kinematic viscosity:
Fresh water ν = 1×10-6 m2/s t=20°С
Light oil ν = 25×10-6 m2/s t=18°С
Heavy oil ν = 140×10-6 m2/s t=18°С
Mazut ν = 2000×10-6 m2/s t=18°С
Petrol ν = 0.9×10-6 m2/s t=15°С
Kerosene ν = 2.7×10-6 m2/s t=20°С
Hydraulic Industrial Oil I-5A ν = 7×10-6 m2/s t=40°С
Hydraulic Industrial Oil I-8A ν = 10×10-6 m2/s t=40°С
Hydraulic Industrial Oil I-12A ν = 15×10-6 m2/s t=40°С
Hydraulic Industrial Oil I-20A ν = 30×10-6 m2/s t=40°С
Hydraulic Industrial Oil I-30A ν = 45×10-6 m2/s t=40°С
Hydraulic Industrial Oil I-40A ν = 65×10-6 m2/s t=40°С
Hydraulic Industrial Oil I-50A ν = 95×10-6 m2/s t=40°С
Another kinematic viscosity value ×10-6 m2/s

Reynolds number

The Reynolds number is defined as:

Re = (V*D) / ν

The type of flow may be riugtly determined usyng Reynold's number.





Languages
Spanish (ES) Deutsch (DE)
Featured articles
How to read hydraulic circuits
Hydraulic cylinders
Hydraulic accumulators
Best calculators
Pressure loss calculator
Calculating the system curve
Hydraulic cylinder force calculator
This site uses cookies to store information on your computer. Details

This site uses cookies to store information on your computer. Details