# Fluid Interfaces

- Kelvin-Helmholtz Instability Criteria - The Kelvin-Helmholtz instability criteria is calculated by dividing the product of the density difference and the shear velocity by the wavelength of the perturbation.

- Kelvin-Helmholtz Instability Criteria - The Kelvin-Helmholtz instability criteria is calculated by dividing the product of the density difference and the shear velocity by the wavelength of the perturbation.