Practice - Forced Convection (External Flow)
Practice Questions
Test your understanding with targeted questions
Define forced convection.
💡 Hint: Think about how fans and pumps work.
What is the Reynolds number used for?
💡 Hint: It’s a key dimensionless parameter.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is forced convection primarily driven by?
💡 Hint: Consider how air circulates in a room.
True or False: The Reynolds number is used to characterize the flow as laminar or turbulent.
💡 Hint: Think about the definitions we discussed.
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Challenge Problems
Push your limits with advanced challenges
A rectangular duct has a width of 0.5m and height of 0.2m. If the velocity of air flowing through the duct is 3m/s, calculate the Reynolds number. Assume air’s dynamic viscosity is 1.8 e-5 kg/(ms) and density is 1.2 kg/m³.
💡 Hint: Use the formula for Reynolds number focusing on the flow parameters.
Estimate the heat transfer coefficient for a flat plate in turbulent flow with a Reynolds number of 50,000. Use the correlation Nux=0.0296Rex4/5Pr1/3, assuming Pr = 0.7.
💡 Hint: Identify each component in the equation to solve it correctly.
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Reference links
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