Questions from Thermal Fluid Science

Q: How is head loss related to pressure loss? For a given

How is head loss related to pressure loss? For a given fluid, explain how you would convert head loss to pressure loss.

Q: What is turbulent viscosity? What causes it?

What is turbulent viscosity? What causes it?

Q: What is the physical mechanism that causes the friction factor to be

What is the physical mechanism that causes the friction factor to be higher in turbulent flow?

Q: The velocity profile for the fully developed laminar flow of a Newtonian

The velocity profile for the fully developed laminar flow of a Newtonian fluid between two large parallel plates is given by where 2h is the distance between the two plates, u0 is the velocity at the...

Q: How much work, in kJ, can a spring whose spring

How much work, in kJ, can a spring whose spring constant is 3 kN/cm produce after it has been compressed 3 cm from its unloaded length?

Q: Water at 15°C (ρ = 999.1 kg

Water at 15°C (ρ = 999.1 kg/m3 and μ = 1.138 × 10−3 kg/m·s) is flowing steadily in a 30-m-long and 6-cm diameter horizo...

Q: What is the physical significance of the Reynolds number? How is

What is the physical significance of the Reynolds number? How is it defined for (a) flow in a circular pipe of inner diameter D and (b) flow in a rectangular duct of cross section a × b?

Q: Water at 70°F passes through 0.75-in

Water at 70°F passes through 0.75-in-internal-diameter copper tubes at a rate of 0.5 lbm/s. Determine the pumping power per ft of pipe length required to maintain this flow at the specified rate.

Q: Heated air at 1 atm and 100°F is to be

Heated air at 1 atm and 100°F is to be transported in a 400-ft-long circular plastic duct at a rate of 12 ft3/s. If the head loss in the pipe is not to exceed 50 ft, determine the minimum diameter of...

Q: In fully developed laminar flow in a circular pipe, the velocity

In fully developed laminar flow in a circular pipe, the velocity at R/2 (midway between the wall surface and the centerline) is measured to be 11 m/s. Determine the velocity at the center of the pipe....