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Marangoni number

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Title: Marangoni number  
Author: World Heritage Encyclopedia
Language: English
Subject: Dimensionless quantity, Reynolds number, Shields parameter, Atwood number, Brinkman number
Collection: Dimensionless Numbers of Fluid Mechanics, Dimensionless Numbers of Thermodynamics, Fluid Dynamics
Publisher: World Heritage Encyclopedia

Marangoni number

The Marangoni number (Ma) 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.

\mathrm{Ma} = - {\frac{d\gamma}{dT}}\frac{L \Delta T}{\eta \alpha}

See also

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