Ohnesorge number

Input(s)

$\mu$: Liquid Viscosity (Pa s or $\mathrm{kg} /(\mathrm{m} \mathrm{s})$ )

L: Characteristic length (m)

$\rho$: Liquid Density $\left(\mathrm{kg} / \mathrm{m}^{3}\right)$

$\sigma$: Surface Tension $(\mathrm{N} / \mathrm{m})$

Output(s)

Oh: Ohnesorge Number (dimensionless)

Formula(s)

$$ \mathrm{Oh}=\frac{\mu}{(\rho * \sigma * \mathrm{~L})^{0.5}} $$

Reference(s)

Wikipedia.org.