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:
“It seems to me that there must be an ecological limit to the number of paper pushers the earth can sustain, and that human civilization will collapse when the number of, say, tax lawyers exceeds the world’s total population of farmers, weavers, fisherpersons, and pediatric nurses.”
—Barbara Ehrenreich (b. 1941)