Q: A cryogenic fluid is stored in a 0.3-m
A cryogenic fluid is stored in a 0.3-m-diameter spherical container in still air. If the convection heat transfer coefficient between the outer surface of the container and the air is 6.8 W/m2 K, the...
See AnswerQ: Show that in the limit as /the difference equation for one
Show that in the limit as /the difference equation for one-dimensional steady conduction with heat generation, Eq. (4.2), is equivalent to the differential equation, Eq. (2.24).
See AnswerQ: Consider a pin fin with variable conductivity k(T), constant
Consider a pin fin with variable conductivity k(T), constant cross-sectional area Ac and constant perimeter, P. Develop the difference equations for steady one-dimensional conduction in the fin, and s...
See AnswerQ: How would you treat a radiation heat transfer boundary condition for a
How would you treat a radiation heat transfer boundary condition for a one-dimensional steady problem? Develop the difference equation for a control volume near the boundary, and explain how to solve...
See AnswerQ: How should the control volume method be implemented at an interface between
How should the control volume method be implemented at an interface between two materials with different thermal conductivities? Illustrate with a steady, one-dimensional example. Neglect contact resi...
See AnswerQ: How would you include contact resistance between the two materials in Problem
How would you include contact resistance between the two materials in Problem 4.12? Derive the appropriate difference equations.
See AnswerQ: A turbine blade 5 cm long with a cross-sectional area
A turbine blade 5 cm long with a cross-sectional area A = 4.5 cm2 and a perimeter P = 12 cm is made of a high-alloy steel (k = 25 W/m K) . The temperature of the blade attachment point is 500Â&d...
See AnswerQ: Light-emitting diodes or LEDs are currently perhaps the most energy
Light-emitting diodes or LEDs are currently perhaps the most energy-efficient lighting systems. Finned- surface heat sinks are used to cool high-intensity LED lighting that are used for spot and/or tr...
See AnswerQ: A heat sink made of an array of fins that have a
A heat sink made of an array of fins that have a straight, rectangular cross section is used to cool an electronic micro-chip module, as schematically shown in the figure. The heat sink (base and f...
See AnswerQ: Show that in the limit as / the difference equation
Show that in the limit as the difference equation, Eq. (4.13), is equivalent to the differential equation, Eq. (2.5).
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