Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.

A perfectly static interface between the fluid layers would not necessarily be unstable.

This section is about frequency dispersion for waves on a fluid layer forced by gravity, and according to linear theory.

Our atmosphere is a massive fluid layer, and the right application of physics makes it possible for humans to traverse it.

Turbulence typically plays a role in the formation of fluid mixed layers.

Because the water becomes cooler but remains salty, it becomes denser than the fluid layer beneath it.

Outside the Orn, temperatures had risen fast as they ploughed into the heatsink of this near fluid layer in the atmosphere.

This technique involved applying a fluid layer over the animated character.

Based on these observations, Quincke asserted that the cell membrane comprised a fluid layer of fat less than 100 nm thick.

The results are presented in dimensional form, for water waves on a fluid layer of depth "h".