Questions from Thermal Fluid Science

Q: Consider heat conduction through a wall of thickness Land area A.

Consider heat conduction through a wall of thickness Land area A. Under what conditions will the temperature distributions in the wall be a straight line?

Q: Consider two cold canned drinks, one wrapped in a blanket and

Consider two cold canned drinks, one wrapped in a blanket and the other placed on a table in the same room. Which drink will warm up faster?

Q: How does the overall effectiveness of a finned surface differ from the

How does the overall effectiveness of a finned surface differ from the effectiveness of a single fin?

Q: The steam requirements of a manufacturing facility are being met by a

The steam requirements of a manufacturing facility are being met by a boiler whose rated heat input is 5.5 × 106 Btu/h. The combustion efficiency of the boiler is measured to be 0.7 by a handheld flue...

Q: Hot water is to be cooled as it flows through the tubes

Hot water is to be cooled as it flows through the tubes exposed to atmospheric air. Fins are to be attached in order to enhance heat transfer. Would you recommend attaching the fins inside or outside...

Q: Consider two finned surfaces that are identical except that the fins on

Consider two finned surfaces that are identical except that the fins on the first surface are formed by casting or extrusion, whereas they are attached to the second surface afterwards by welding or t...

Q: The heat transfer surface area of a fin is equal to the

The heat transfer surface area of a fin is equal to the sum of all surfaces of the fin exposed to the surrounding medium, including the surface area of the fin tip. Under what conditions can we neglec...

Q: Does the (a) efficiency and (b) effectiveness of

Does the (a) efficiency and (b) effectiveness of a fin increase or decrease as the fin length is increased?

Q: Two pin fins are identical, except that the diameter of one

Two pin fins are identical, except that the diameter of one of them is twice the diameter of the other. For which fin is the (a) fin effectiveness and (b) fin efficiency higher? Explain.

Q: Two plate fins of constant rectangular cross section are identical, except

Two plate fins of constant rectangular cross section are identical, except that the thickness of one of them is twice the thickness of the other. For which fin is the (a) fin effectiveness and (b) fin...