You are currently viewing Important Facts: Quiz on Types of Fluid Flow II 7 MCQs with Explanations

Important Facts: Quiz on Types of Fluid Flow II 7 MCQs with Explanations

Types of Fluid Flow Quiz

1. Particle Motion in Laminar Flow

How do fluid particles move in laminar flow?

2. Boundary Layer in Turbulent Flow

What is the characteristic of the boundary layer in turbulent flow?

3. Viscous Forces in Laminar Flow

How are the viscous forces in laminar flow compared to turbulent flow?

4. Equations for Turbulent Flow

How would you describe the equations for turbulent flow compared to laminar flow?

5. Examples of Turbulent Flow

Which of the following is an example of turbulent flow?

6. Mixing in Turbulent Flow

How do particles move in turbulent flow?

7. Boundary Layer Thickness

How does the thickness of the boundary layer change with increasing velocity in laminar flow?

Short Article on Types of Fluid Flow

Types of Fluid Flow

When a fluid moves through a pipe, two distinct types of flow are possible: laminar and turbulent.

Laminar flow occurs in fluids moving with small average velocities. In laminar flow, the fluid particles move along the length of the pipe in a very orderly fashion, with little or no sideways motion across the width of the pipe. This is because the viscous forces acting between the fluid particles are strong enough to prevent them from mixing.

Turbulent flow becomes apparent as the velocity of the fluid is increased above a critical velocity. In turbulent flow, the fluid particles move in a random, disorganised fashion, from side to side across the pipe as well as along its length. This is because the viscous forces acting between the fluid particles are not strong enough to prevent them from mixing.

There will, however, always be a layer of laminar flow at the pipe wall – the so-called “boundary layer”. This is because the fluid particles at the wall are slowed down by friction with the wall. The thickness of the boundary layer increases with increasing velocity.

The two types of fluid flow are described by different sets of equations. In general, for most practical situations, the flow will be turbulent.

Here is a table summarizing the key differences between laminar and turbulent flow:

FeatureLaminar flowTurbulent flow
Particle motionSmooth, orderlyRandom, disorganised
MixingLittle or no mixingParticles mix freely
Viscous forcesStrongWeak
Boundary layerThickThin
EquationsSimplerMore complex

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Here are some examples of laminar and turbulent flow:

  • Laminar flow:
    • Blood flowing through capillaries
    • Smoke rising from a cigarette
  • Turbulent flow:
    • Water flowing through a river
    • Air flowing around an airplane wing

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