uniform and non uniform flow and laminar and turbulent flow

• When velocity of fluid at any instant of time do not change from point to point in a flow field, the flow is said to be uniform. 
• When velocity of fluid at any instant of time change from point to point in a flow field, the flow is said to be non uniform. 
• In the laminar flow the fluid particles move along smooth paths in laminar (or) layers with one layer gliding smoothly over the adjacent layer. 
• In turbulent flow the fluid particles move in a very irregular path causing an exchange of momentum from one portion of the fluid to the another. The turbulence setup greater shear stress throughout the fluid and causes more irreversibility and losses.