In the gravity type oil water separating field, the shearing field mainly exists in all kinds of collison packing and flow boundary of vessel.

Like in an infinite flow, we find that laminar boundary layer, transition region and turbulent boundary layer also exist along a flat plate in open channel flow boundary layers.

Mantle material can sink at a plate boundary, and then flow back upward farther away, pushing on the crust - a process called small scale convection.