Laplace number

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The Laplace number (La), also known as the Suratman number (Su), is a dimensionless number used in the characterization of free surface fluid dynamics. It is represents a ratio of surface tension to the momentum-transport (especially dissipation) inside a fluid.

It is defined as follows:

<math>La = Su = \frac{\sigma \rho L}{\mu^2}\,</math>

where:

• σ = surface tension
• ρ = density
• L = characteristic length
• μ = dynamic viscosity

[edit] See also

• Ohnesorge number - There is an inverse relationship, <math>La = Oh^{-2}</math>, between the Laplace number and the Ohnesorge number.

v • d • e Dimensionless numbers in fluid dynamics

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