Practice Dilatation Or Extensional Strain (1.7) - Viscous Fluid Flow (Contd.)

Practice: Dilatation or Extensional Strain

Lesson 1.7Viscous Fluid Flow (Contd.)

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9 questions

Flashcard drill
4 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
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define dilatation in your own words.
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Think about how materials change size or shape.
Question 2.
What is the formula for extensional strain in the x-direction?
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It’s based on the change in velocity according to position.
3Question 3.
What is dilatation in fluid mechanics?
- Increase in density
- Change in length
- Change in color
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Think about how fluids respond to pressure changes.
4Question 4.
True or False: Shear strain measures the volume change of a fluid.
- True
- False
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Consider what shear means in layered fluids.
Question 5.
A fluid exhibits velocity components given by $u = 3x^2 + y$ , $v = 4xz + z^2$ , and $w = -2y + 5$ . Calculate all components of the strain tensor.
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Look carefully at the derivatives to extract each component.
Question 6.
Consider a fluid at rest that experiences uniform expansion. Define the dilatation in terms of volume increase and relate it to the strain rates you learned.
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Remember how volume relates to length in three dimensions.

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