Questions from Thermal Fluid Science

Q: Define the frontal area of a body subjected to external flow.

Define the frontal area of a body subjected to external flow. When is it appropriate to use the frontal area in drag and lift calculations?

Q: What fluid property is responsible for the development of the velocity boundary

What fluid property is responsible for the development of the velocity boundary layer? What is the effect of the velocity on the thickness of the boundary layer?

Q: How is the average friction coefficient determined in flow over a flat

How is the average friction coefficient determined in flow over a flat plate?

Q: Light oil at 75°F flows over a 17-ft

Light oil at 75°F flows over a 17-ft-long flat plate with a free-stream velocity of 5 ft/s. Determine the total drag force per unit width of the plate.

Q: The local atmospheric pressure in Denver, Colorado, (elevation 1610

The local atmospheric pressure in Denver, Colorado, (elevation 1610 m) is 83.4 kPa. Air at this pressure and at 25°C flows with a velocity of 9 m/s over a 2.5-m × 5-m flat plate. Determine the drag fo...

Q: Air at 70°F flows over a 10-ft-

Air at 70°F flows over a 10-ft-long flat plate at 25 ft/s. Determine the local friction coefficient at intervals of 1 ft, and plot the results against the distance from the leading edge.

Q: Consider laminar flow of a fluid over a flat plate. Now

Consider laminar flow of a fluid over a flat plate. Now the free-stream velocity of the fluid is tripled. Determine the change in the drag force on the plate. Assume the flow remains laminar.

Q: Consider a refrigeration truck traveling at 70 mi/h at a

Consider a refrigeration truck traveling at 70 mi/h at a location where the air is at 1 atm and 80°F. The refrigerated compartment of the truck can be considered to be a 9-ft-wide, 8-ft-hig...

Q: How are heat, internal energy, and thermal energy related to

How are heat, internal energy, and thermal energy related to each other?

Q: Reconsider Prob. 15–46E. Using appropriate software, investigate

Reconsider Prob. 15–46E. Using appropriate software, investigate the effect of truck speed on the total drag force acting on the top and side surfaces and the power required to overc...