Define : (i) Laminar flow (ii) Turbulent flow

Define : (i) Laminar flow (ii) Turbulent flow
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2 Answers

Answer :

(i) Laminar flow : if the average velocity of the fluid is very low, then fluid particles will flow in parallel lines along the sides of the pipe. This type of flow is called as laminar flow.

(ii) Turbulent flow: if velocity of fluid is increased beyond a certain limit, eddy current starts to form. And flow becomes turbulent flow.
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Answer :

Laminar flow: -

1. Laminar flow occurs when the fluid flows in infinitesimal parallel layers with no disruption between them. For laminar flow Reynolds number Re < 2300 OR 2. The flow in which fluid flows smoothly such that fluid layers are parallel to each other OR 3. No streamlines intersect each other, such type of flow is known as laminar flow. OR 4. When all the molecules of flow are parallel to each other, it is called Laminar flow.

Turbulent flow: -

I. Turbulent flow occurs when the fluid does not flow in parallel layers, the lateral mixing is very high, and there is a disruption between the layers. Re > 4000 OR II. When all the molecules of flow are scattered without fixed position it is called Turbulent flow. OR The flow in which fluid flows in zig-zag manner and fluctuate irregularly in such a way that its velocity changes irregularly, such type of flow is known as turbulent flow. 
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