Heat-transfer Questions Set 13:
What is the characteristic length for a sphere?
Solution:
Which material has the lowest thermal conductivity?
Solution:
Which material has the highest specific heat capacity?
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What happens to the radiation incident on a black body?
Solution:
Heat transfer is most efficient during nucleate boiling when the solid surface is:
Solution:
If the surface or convective thermal resistance is given, which other parameter is required to obtain the Biot number?
Solution:
The given general heat conduction equation is:
∂²T/∂x² + ∂²T/∂y² + ∂²T/∂z² = ∂T/∂t
Determine which category this equation belongs to.
Solution:
The given general heat conduction equation is:
∂²T/∂x² + ∂²T/∂y² + ∂²T/∂z² + g/k = 0
Determine the category this equation belongs to.
Solution:
The relevant boundary conditions in the case of heat dissipation from a fin insulated at the tip are:
Solution:
Two long rods A and B of the same diameter have thermal conductivities k and 4k, respectively. One end of both rods is inserted into a furnace at 400 K. At a section 9.5 m away from the furnace, the temperature of rod B is 120 degrees Celsius. Find the distance from the furnace end where the same temperature would be reached in rod A.
Solution:
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