Questions from Thermal Fluid Science

Q: As a spherical ammonia vapor bubble rises in liquid ammonia, its

As a spherical ammonia vapor bubble rises in liquid ammonia, its diameter changes from 1 cm to 3 cm. Calculate the amount of work produced by this bubble, in kJ, if the surface tension of ammonia is 0...

Q: A farmer is to pump water at 70°F from a

A farmer is to pump water at 70°F from a river to a water storage tank nearby using a 125-ft-long, 5-in-diameter plastic pipe with three flanged 90° smooth bends. The water velocity near the river sur...

Q: Reconsider Prob. 14–74E. Using appropriate software, investigate

Reconsider Prob. 14–74E. Using appropriate software, investigate the effect of the pipe diameter on the required electric power input to the pump. Let the pipe diameter vary from 1 to 10 in, in increm...

Q: A water tank filled with solar-heated water at 40°

A water tank filled with solar-heated water at 40°C is to be used for showers in a field using gravity-driven flow. The system includes 35 m of 1.5-cm-diameter galvanized iron piping with four miter b...

Q: Two water reservoirs A and B are connected to each other through

Two water reservoirs A and B are connected to each other through a 40-m-long, 2-cm-diameter cast iron pipe with a sharp-edged entrance. The pipe also involves a swing check valve and a fully open gate...

Q: A vented tanker is to be filled with fuel oil with ρ

A vented tanker is to be filled with fuel oil with ρ = 920 kg/m3 and μ = 0.045 kg/m·s from an underground reservoir using a 25-m-long, 4-cm-diameter plastic h...

Q: Water at 15°C is to be pumped from a reservoir

Water at 15°C is to be pumped from a reservoir (zA = 2 m) to another reservoir at a higher elevation (zB = 9 m) through two 25-m-long plastic pipes connected in parallel. The diameters of t...

Q: Consider laminar flow in a circular pipe. Is the wall shear

Consider laminar flow in a circular pipe. Is the wall shear stress τw higher near the inlet of the pipe or near the exit? Why? What would your response be if the flow were turbulent?

Q: A certain part of cast iron piping of a water distribution system

A certain part of cast iron piping of a water distribution system involves a parallel section. Both parallel pipes have a diameter of 30 cm, and the flow is fully turbulent. One of the branches (pipe...

Q: Repeat Prob. 14–80 assuming pipe A has a halfway

Repeat Prob. 14–80 assuming pipe A has a halfway closed gate valve (KL = 2.1) while pipe B has a fully open globe valve (KL = 10), and the other minor losses are negligible. Data fr...