The Marangoni number (Mg) is a dimensionless number named after Italian scientist Carlo Marangoni. The Marangoni number may be regarded as proportional to (thermal-) surface tension forces divided by viscous forces. It is – for example – applicable to bubble and foam research or calculations of cryogenic spacecraft propellant behaviour.
- : surface tension, (SI units: N/m)
- : characteristic length, (SI units: m)
- : thermal diffusivity, (SI units: m²/s)
- : dynamic viscosity, (SI units: kg/(s·m)),
- : temperature difference, (SI units: °C)),
Famous quotes containing the word number:
“The two great points of difference between a democracy and a republic are: first, the delegation of the government, in the latter, to a small number of citizens elected by the rest; secondly, the greater number of citizens and greater sphere of country over which the latter may be extended.”
—James Madison (1751–1836)