Marangoni number

Input(s)

SG: Change in Surface Tension per unit Temp (N/m/K)

L: Characteristic length (m)

$\mathrm{dT}$: Speed of sound in the medium $(\mathrm{K})$

$\alpha$: Thermal diffusivity $\left(\mathrm{m}^{2} / \mathrm{s}\right)$

$\sigma$: Dynamic viscosity $(\mathrm{kg} /(\mathrm{s} \mathrm{m}))$

Output(s)

$\mathrm{Mg}$: Marangoni number (dimensionless)

Formula(s)

$$ M g=S G * L * \frac{d T}{\alpha * \sigma} $$

Reference(s)

Wikipedia.org.