Questions from Principles Of Heat Transfer

Q: Mild steel nails were driven through a solid wood wall consisting of

Mild steel nails were driven through a solid wood wall consisting of two layers, each 2.5-cm thick, for reinforcement. If the total cross-sectional area of the nails is 0.5% of the wall area, determin...

Q: The Alaska pipeline carries 2 million barrels of crude oil per day

The Alaska pipeline carries 2 million barrels of crude oil per day from Prudhoe Bay to Valdez, covering a distance of 800 miles. The pipe diameter is 48 in., and it is insulated with 4 in. of fibergla...

Q: An engineer is designing a heating system that consists of multiple tubes

An engineer is designing a heating system that consists of multiple tubes placed in a duct carrying the air supply for a building. She decides to perform preliminary tests with a single copper tube of...

Q: In a metal manufacturing plant and its heat treatment process, a

In a metal manufacturing plant and its heat treatment process, a long, hexagonal copper extrusion (or rod) comes out of a heat-treatment furnace at 400°C and is then quenched by immersing i...

Q: To measure the mass flow rate of a fluid in a laminar

To measure the mass flow rate of a fluid in a laminar flow through a circular pipe, a hot-wire-type velocity meter is placed in the center of the pipe. Assuming that the measuring station is far from...

Q: Show that for fully developed laminar flow between two flat plates spaced

Show that for fully developed laminar flow between two flat plates spaced 2a apart, the Nusselt number based on the “bulk mean” temperature and the pas- sage spacin...

Q: Repeat Problem 7.10 but assume that one wall is insulated

Repeat Problem 7.10 but assume that one wall is insulated while the temperature of the other wall increases linearly with x.

Q: Engine oil flows at a rate of 0.5 kg/

Engine oil flows at a rate of 0.5 kg/s through a 2.5-cm-ID tube. The oil enters at 25°C while the tube wall is at 100°C. (a) If the tube is 4 m long, determine whether the flow is fully developed. (...

Q: The equation: / was recommended by H. Hausen

The equation: was recommended by H. Hausen (Zeitschr. Ver. Deut. Ing., Beiheft, No. 4, 1943) for forced-convection heat transfer in fully developed laminar flow through tubes maintained at a uniform s...

Q: Water enters a double-pipe heat exchanger at 60°C

Water enters a double-pipe heat exchanger at 60°C. The water flows on the inside through a copper tube of 2.54-cm-ID at an average velocity of 2 cm/s. Steam flows in the annulus and condens...