## Ohnesorge number $\text{Oh} = \frac{\mu}{\sqrt{\rho \sigma L}} = \frac{\sqrt{\text{We}}}{\text{Re}} \sim \frac{\text{viscous forces}}{\sqrt{\text{inertia} \cdot \text{surface tension}}}$ This dimensionless number combined both [[Weber number]] and [[Reynolds number]], namely taken viscous force and surface tension into account. >[!Notice] >Ohnesorge number is directly related to Laplace number. >$\text{Oh}=\frac{1}{\text{La}^{1/2}}$ >See https://en.wikipedia.org/wiki/Laplace_number. >[!Info] >See more on wiki: https://en.wikipedia.org/wiki/Ohnesorge_number.