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 This calculator computes the Reynolds Number given the flow characteristics asked for below. It outputs the flow type you can expect (laminar, transitional, or turbulent) based on the Reynolds Number result. Think of the Characteristic Distance as the distance from the leading edge (where the fluid first makes contact) for flow over a plate, or as the pipe diameter for flow inside a pipe.
Inputs
 Free-stream fluid velocity, V: m/s cm/s ft/s mph in/s Characteristic distance (or pipe diameter), D: m in ft cm Fluid density, r: kg/m^3 lb/in^3 kg/l Fluid viscosity (dynamic), m: cP Pa-s kg/m-s slug/ft-s
 Reynolds Number, R: 1.00 × 105

 Plate flow is transitioning to turbulent at a distance D from the leading edge. Pipe flow is fully turbulent in a pipe of diameter D.
Equation Behind the Calculator
 The Reynolds Number is found from the equation,
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Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

Mechanical Engineers Outlook

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