Practice Physical Modelling Experiments (15.2.1) - Dimension Analysis and Similarity

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9 questions

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6 sample questions

Question 1.
What is geometric similarity?
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Think about scaling shapes.
Question 2.
What does dimensional analysis check?
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Dimensions must match.
3Question 3.
What is geometric similarity?
- Maintaining the same shape and proportions
- Achieving equal forces
- Matching flow patterns
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Think of scaling shapes.
4Question 4.
The Reynolds Number helps predict:
- True
- False
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What type of flow does it relate to?
Question 5.
You have a model scaled down by a factor of 1:50 of a prototype dam. If the model has a flow velocity of 2 m/s, calculate the equivalent flow velocity in the prototype.
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Convert the length scale to velocity using the square root of the scale factor.
Question 6.
Create a scenario where dynamic similarity is crucial in a hydrodynamic test. Describe the factors to be considered and how you would ensure dynamic similarity.
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Focus on the forces like pressure, gravity, and inertia.

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