One application of the Weber number is for the study of heat pipes.

Surface tension makes all dynamical problems nonlinear (see Weber number).

Relevant fluid dynamics non-dimensional parameters include the Bond number, the Weber number, and the Reynolds number.

Laplace number is related to Reynolds number (Re) and Weber number (We) in the following way:

Splashes are characterized by transient ballistic flow, and are governed by the Reynolds number and the Weber number.

The Weber number is the dimensionless parameter that determines the onset of this phenomenon called the entrainment limit (Weber number greater than or equal to 1).

In this case the Weber number is defined as the ratio of the momentum in the vapor layer divided by the surface tension force restraining the liquid, where the characteristic length is the surface pore size.

The Weber number is a dimensionless number in fluid mechanics that is often useful in analysing fluid flows where there is an interface between two different fluids, especially for multiphase flows with strongly curved surfaces.

In the image of a brick splashing into water to the right, one can identify freely moving airborne water droplets, a phenomenon typical of high Reynolds number flows; the intricate non-spherical shapes of the droplets show that the Weber number is high.