Practice Mass Flux Through Elemental Strip (2.3) - Boundary Layer Theory (Contd.,)

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11 questions

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5 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define mass flux.
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Think about mass flow and area.
Question 2.
What does displacement thickness measure?
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Consider where the streamline is relative to the boundary.
3Question 3.
What is mass flux?
- Amount of mass per unit volume
- Amount of mass per unit area per unit time
- Amount of mass per unit weight
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Remember the relationship between mass and area.
4Question 4.
Displacement thickness is defined as:
- True
- False
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Think about the displacement from the wall.
Question 5.
A flat plate has a boundary layer thickness of 0.02 m, with a uniform velocity U of 5 m/s. Calculate the mass flux if the density of the fluid is 1000 kg/m³.
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Use mass flux equation and consider the area of the elemental strip.
Question 6.
Given a velocity distribution within the boundary layer defined as u/U = 3y/2δ - y²/2δ² for y in [0, δ]. If δ = 0.1 m, calculate the displacement thickness.
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Set up the integral correctly and evaluate with respect to y.

7 more questions in this section. Enroll free to practise them all.