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Compare streamline flow and Turbulent flow.

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Streamline flow Turbulent flow i. The smooth flow of a fluid, with velocity smaller than certain critical velocity (limiting value of velocity), is called streamline flow or laminar flow of a fluid. The irregular and unsteady flow of a fluid when its velocity increases beyond critical velocity are called turbulent flow. ii. In a streamlined flow, the velocity of a fluid at a given point is always constant. In a turbulent flow, the velocity of a fluid at any point does not remain constant. iii. Two streamlines can never intersect, i.e., they are always parallel and hence can never form eddies. In a turbulent flow, at some points, the fluid may have a rotational motion which gives rise to eddies. iv. Streamline flow over a plane surface can be assumed to be divided into a number of plane layers. In a flow of liquid through a pipe of uniform cross-sectional area, all the streamlines will be parallel to the axis of the tube. A flow tube loses its order and particles move in a random direction.

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	Streamline flow	Turbulent flow
i.	The smooth flow of a fluid, with velocity smaller than certain critical velocity (limiting value of velocity), is called streamline flow or laminar flow of a fluid.	The irregular and unsteady flow of a fluid when its velocity increases beyond critical velocity are called turbulent flow.
ii.	In a streamlined flow, the velocity of a fluid at a given point is always constant.	In a turbulent flow, the velocity of a fluid at any point does not remain constant.
iii.	Two streamlines can never intersect, i.e., they are always parallel and hence can never form eddies.	In a turbulent flow, at some points, the fluid may have a rotational motion which gives rise to eddies.
iv.	Streamline flow over a plane surface can be assumed to be divided into a number of plane layers. In a flow of liquid through a pipe of uniform cross-sectional area, all the streamlines will be parallel to the axis of the tube.	A flow tube loses its order and particles move in a random direction.

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