Reynolds Number

#Physics
A constant describing fluid flow dependent on the geometry, surface roughness, and etc. of the environment that the fluid is flowing through

$\displaystyle Re=\frac{v_{c}\rho D}{\eta}$

• $\displaystyle v_{c}$ is the critical speed of the fluid
• $\displaystyle \rho$ is the fluid density
• $\displaystyle D$ is the tube diameter
• $\displaystyle \eta$ is the fluid viscosity