What is the difference between laminar and turbulent flow?
Laminar Flow: the flow of a fluid when each particle of the fluid follows a smooth path, paths which never interfere with one another. One result of laminar flow is that the velocity of the fluid is constant at any point in the fluid.
Turbulent Flow: irregular flow that is characterized by tiny whirlpool regions. The velocity of this fluid is definitely not constant at every point. :)
Typical examples of both Laminar and Turbulent flows can be observed in the cigarette smoke (see image).
Philip Johnson, Physics Undergrad, Memorial University, NF, Canada
'To myself I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.'