Results
- Reynolds number
- —
How it works
Enter the fluid density, velocity, pipe inside diameter and dynamic viscosity. Re = ρ · v · D / μ. Below about 2 300 the flow is laminar, above about 4 000 it is turbulent, and in between it is transitional.
Formula
Re = ρ · v · D / μ
Assumptions and limits
For a full pipe with a single-phase Newtonian fluid. Viscosity is dynamic viscosity in mPa·s (the same as centipoise), not kinematic viscosity. The limits 2 300 and 4 000 are the usual guide values; the actual transition depends on pipe roughness and disturbances.
For education and quick estimates only. Check the result against the applicable standards and your project data before using it in design, operation or safety decisions.
Related tools
Embed this tool on your site
Copy the code below into your page. The link to Oil-Gas.net must stay with the tool.
Calculator by Oil-Gas.net