[33] Types of flow
A distinction is made
between laminar flow and turbulent flow. In the case of laminar
flow, the hydraulic fluid moves through the pipe in ordered
cylindrical layers. If the flow velocity of the hydraulic fluid
rises above a critical speed, the fluid particles at the center
of the pipe break away to the side, and turbulence
results.
Turbulent flow should be avoided in hydraulic circuits by ensuring they are adequate sized.