Reynolds number for air

The Reynolds number is a dimensionless number.

Symbol
$\mathrm{Re}_{air}$
Formulae
$\frac{D_{o} V_{air}}{\nu_{air}}$for cable
$\frac{Di_{t} V_{air}}{\nu_{air}}$for tunnel
$\frac{D_{o} V_{air}}{\nu_{air}}$in free air
Related
$D_{o}$
$\nu_{air}$
$V_{air}$