Practice Continuity Equation (6.2) - Computational fluid dynamics (Contd.)

Practice: Continuity Equation

Lesson 6.2Computational fluid dynamics (Contd.)

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8 questions

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2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What does the continuity equation express in fluid dynamics?
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Think about what happens to mass in a flowing fluid.
Question 2.
What is the mathematical representation of the continuity equation for incompressible flow?
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Consider how we express changes in velocity in a flow.
3Question 3.
What principle does the continuity equation illustrate?
- Mass conservation
- Energy conservation
- Momentum conservation
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Think about what remains constant in a flowing fluid.
4Question 4.
Is the Reynolds stress higher in laminar or turbulent flows?
- True
- False
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Recall the characteristics of laminar versus turbulent flow.
Question 5.
Given a pipe system where the diameter decreases, analyze how the continuity equation predicts changes in flow velocity and pressure.
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Use the continuity equation and remember the relationship between area and velocity.
Question 6.
Using the Reynolds averaging approach, demonstrate how to derive an expression for the average turbulent flow rate in a turbulent pipe flow.
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Focus on how the fluctuation components will affect the average and total flow.

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