17 Questions
Why does engine oil require a larger pump compared to water to move at a specified velocity in a given tube?
Engine oil has higher viscosity than water.
What does the average velocity in fluid flow represent?
Speed of the fluid particles moving in a tube
Why is the mean temperature significant for thermodynamics analysis and heat transfer calculations?
It affects flow characteristics like friction losses and heat transfer.
How does the viscosity of a fluid affect the energy required to pump it at a specified velocity?
Higher viscosity requires more energy due to lower resistance.
What does a pump need to provide in order to overcome a fluid's resistance to flow and pump it at a specified velocity?
Pressure
What is the defining characteristic that determines when fluid flow becomes turbulent?
Reynolds number exceeding 2000 to 4000
What parameter is used to characterize the efficiency of fluid flow through a channel or conduit?
Hydraulic diameter
Why do inviscid fluids not develop a velocity boundary layer in pipes?
Lack of resistance between flow layers
In a circular tube, what is the hydraulic diameter equal to?
Diameter of the tube
What prevents the velocity profile from changing in the fully developed region of flow in a circular tube?
Constant wall temperature
What influences the temperature profile in a fully developed flow in a circular tube?
Heat transfer mechanisms and boundary conditions
How does the viscosity of engine oil compare to water at room temperature?
Engine oil has higher viscosity than water.
What is the significance of the Reynolds number in analyzing flow through circular tubes?
It determines whether the flow is laminar or turbulent.
Which parameter is essential for understanding friction losses in fluid flow?
Average velocity
In the context of fluid flow through circular tubes, why is a constant diameter important?
It simplifies calculations and analysis of flow behavior.
Why does engine oil require more energy than water to be pumped at a specified velocity?
Engine oil has higher viscosity, requiring more energy to overcome resistance.
Which parameter is crucial for heat transfer calculations and energy balance in a fluid system?
Mean temperature
Learn about the differences in resistance to flow between engine oil and water at room temperature, and how viscosity affects the energy needed to pump these fluids. Understand why engine oil requires a larger pump to move at a specified velocity in a given tube.
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