Fluid Dynamics:Hydraulics and Pneumatics

What is the difference between laminar and turbulent flow?

The film of fluid that touches the container does not move because of friction with the container’s surface. But the fluid in the middle of the stream does. In laminar flow the transition from not moving to moving at full speed is continuous. Each thin film of water moves slightly faster than the one closer to the surface. In turbulent flow this transition from not moving to full-speed motion occurs suddenly, and the water moves in tiny circles in this region. Laminar flow has more friction than turbulent. A baseball, for example, has more drag in the laminar flow region.


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