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Distinguish between streamline and turbulent flow of a liquid.


Difference between streamline motion and turbulent motion.

i) It is an orderly type of motion in which the liquid flows in parallel layers while, turbulent motion is disorderly type of motion.

ii) Every particle of the liquid follows the path of it's preceeding particle and travel with the same velocity in magnitude and direction whereas, the motion of particles of the liquids becomes different at different points in turbulent flow.

iii) The velocity of streamline flow is less than critical velocity but, in turbulent motion the liquid moves with a velocity greater than the critical velocity of the liquid.

iv) Streamline flow is laminar whereas, turbulent flow is non-laminar. 

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Why is energy loss in a streamlined flow minimum?

In streamline flow, the different layers glide over one another without intermixing. Therefore there is no collision between the molecules of different layers. Hence the energy loses is minimum in a streamline flow.
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The coefficient of viscosity of water is 0.01 poise. What is fluidity and coefficient of kinematic viscosity?

Given that,

Coefficient of viscosity, =0.01 poise

 p = 1 gm/cc

]

Coefficient of kinematic viscosity  =0.01 stokes

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What is critical velocity?

Critical velocity is that velocity of liquid flow, upto which it's flow is streamlined and above which it's flow becomes turbulent. 
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Two streamlines cannot cross each other. Why?

Streamline is a line, straight or curved tangent to which at any point gives the direction of flow of liquid at that point. If two streamlines cross each other, then at that point there will be two tangents and hence two directions of flow of liquid, which is impossible.
Therefore, two streamlines cannot cross each other.
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