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4 cards from this section. Quick, good the night before a test.
Define the entrance region in pipe flow.
Focus on the initial flow behavior in a pipe.
What is a Reynolds number?
Think about classifications of flow.
What does the entrance region of a pipe indicate?
Think about the flow patterns.
The Reynolds number determines if flow is laminar or turbulent.
Recall the critical values for laminar and turbulent flow.
Consider a pipe with a diameter of 2 cm. If water flows through it at a velocity of 3 m/s, calculate the Reynolds number and determine whether the flow is laminar or turbulent.
Keep in mind the critical thresholds for laminar and turbulent flow.
A short pipe with a 4 cm diameter has a length of 1 m. If the flow is classified as laminar, calculate the entrance length using the formula le/D = 0.06 Re. Assume the flow rate gives a Reynolds number of 500.
Double-check your units and calculations for accuracy.
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