Water at 60°F flows from the basement to the second floor through the 0.75‐in. (0.0625‐ft)‐diameter copper pipe (a drawn tubing) at a rate of Q=12.0 gal/min=0.0267 ft3/s and exits through a faucet of diameter 0.50 in. as shown in the Fig. Determine the pressure at point (1) if all losses are included.

A)  Calculate the volumes of the pond and the tank respectively.

5.4. A fluid is flowing in a frictionless diffuser in which A₂/A₁ = 3 and V₁ 10 ft/s. Calculate the pressure recovery (P₂ - P₁) (a) For the fluid being water. (b) For the fluid being air. =

The surface temperature of a pipe with an inner diameter of 30 mm and a length of 1 m is constant and is 93.4 °C. air at an average temperature of 37.8 ° C, at a pressure of 1 atmosphere, flows through this pipe at a surface temperature of 7.0: a) Calculate the convective transfer rate by calculating the convective heat transfer coefficient on the inner side of the pipe. b) Calculate the inlet and outlet temperatures of the air into the pipe

17.17. The fins on the radiator of your car are about 2 in long. When your car is going 60 mi/h, the free-stream velocity of the air approaching these fins (under the hood of the car and behind the grille) is estimated to be 40 mi/h. Estimate the boundary layer thickness at the downstream end of the fins.

Water at 30°C is being pumped through the annular area of a laboratory scale 1-pass, 1-shell tube exhanger with 4 tubes (galvanized iron) at a flow rate of 0.1 m³/s. The inside diameter of the shell is 18.4 cm while the outside diameter of each inner pipe is 2.7 cm. The length of the system is 84.9 m. The density and viscosity of water at 30°C are 997.5 kg/m³ and 0.000792 Pa.s. The relative roughness of galvanized iron pipe is 1.5 x 10-4 m. Determine the Reynolds Number.

A Poiseuille flow experiment was carried out to measure the viscosity of air at 298 K. The sample was allowed to flow through a 100 cm tube of internal diameter 1 mm. The high pressure end was at 865 Torr and the low-pressure end was at 760 Torr. The volume was measured at the latter pressure. In 59 seconds a volume of 90.2cm° passed through the tube What is the viscosity (use the unit cp) of air at this temperature?

1

Repeat problem 9.13 for the case where the fluid is water at 15°C, assuming the Reynolds number is kept constant by changing the freestream velocity. problem 9.13: A flat plate 1 m long and 0.5 m wide is parallel to a flow of air at a temperature of 25°C. The velocity of the air far from the plate is 20 m/s. (a) Is the flow laminar or turbulent? (b) Find the maximum thickness of the boundary layer. (c) Find the overall drag coefficient CF , assuming that transition occurs at the leading edge. (d) Find the total drag of the plate if the air covers both sides.  

0.2 Air at a temperature of -10°C flows through a supersonic wind tunnel. A shadowgraph photograph of the flow reveals weak waves originating at imperfections on the wall. These weak waves are at angle of 40° to the flow as shown in the figure. Find the Mach number and velocity in the wind tunnel. Mach waves 40" 40 Imperfections in wall