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 represents a ratio of surface tension
to the momentum
-transport (especially dissipation
) inside a fluid.
It is defined as follows:
Laplace number is related to Reynolds number (Re) and Weber number (We) in the following way:
- Ohnesorge number - There is an inverse relationship, , between the Laplace number and the Ohnesorge number.