Question

15. At large flow velocities the flow of a fluid becomes 1
a. Viscous b. turbulent
c. compressible
d.laminar​

Answer 1

Heya,

The answer is b. turbulent.

At large flow velocity, the flow of a liquid becomes turbulent.

For more details on this topic , see Reynold's number .

Regards

Kshitij

Answer 2

Answer:

At large flow velocities, the flow of fluid becomes turbulent (option-b).

Explanation:

What is the viscosity of a liquid?

• The internal resistance offered by a liquid to its flow is known as viscosity.
• The viscosity of a liquid occurs due to the resistance between the different liquid layers which move at variable speeds.
  Imagine a layer of liquid sample flowing through a pipe of cross-sectional area A.
  Then the layers of liquid moving in the middle get the least resistance to its flow and thus flow at a comparable higher speed than the layers situated at the periphery of the pipe. [Refer to the diagram attached below]

• The coefficient of viscosity is thus determined by:
  $F_{v}= \eta A \frac{dv}{dt}$

What is Reynold's number?

Reynold's number is a dimensionless quantity used to measure the flow pattern of a liquid, i.e., it is at a steady laminar flow or violent turbulent flow.
At low velocities, the liquid is under laminar flow.
At large velocities (after crossing a specific velocity called the critical velocity), the liquid flow becomes turbulent.

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