Fluid Mechanics

#fluid-mechanics

1.0

Equations

All Very important (1)

Reynolds number for stirred tank

Very important

Re = \frac{d_i^2 N_i \rho}{\mu}

$Re$ — Reynolds number (ratio of inertial to viscous forces), dimensionless
$d_i$ — diameter of the impeller, in metres ( $\text{m}$ )
$N_i$ — frequency of the impeller, in reciprocal seconds ( $\text{s}^{-1}$ )
$\rho$ — density of the fluid, in kilograms per cubic metre ( $\text{kg/m}^3$ )
$\mu$ — viscosity, in pascal-seconds ( $\text{Pa} \cdot \text{s}$ )
$Re < 10$ — laminar
$10 \le Re \le 10{,}000$ — transitional
$Re > 10{,}000$ — turbulent

01 formula