What is Reynolds Number?
Reynolds Number is a dimensionless quantity that helps predict flow patterns in different fluid flow situations. It represents the ratio of inertial forces to viscous forces within a fluid. This number is crucial in determining whether a flow will be laminar (smooth) or turbulent (chaotic).
How to Calculate Reynolds Number
Step 1: Select your fluid type from the dropdown menu or choose “Custom Fluid” if your fluid isn’t listed.
Step 2: If using a custom fluid, enter the fluid’s density (ρ) in kg/m³ and dynamic viscosity (μ) in kg/m·s.
Step 3: Enter the flow velocity (v) in meters per second.
Step 4: Input the characteristic length (L) in meters. For pipe flow, this is typically the pipe’s diameter.
Step 5: Click the calculate button to obtain your Reynolds Number and flow regime classification.
Step 6: Review the results, which will show the Reynolds Number and indicate whether the flow is laminar (Re < 2100), transitional (2100 < Re < 4000), or turbulent (Re > 4000).