Question

Heat is conducted in the axial direction through a cylinder by heating one end. If the diameter of the cylinder is doubled (but the cylinder material, cylinder length, and the temperatures at both ends of the cylinder are unchanged), how will the heat transfer rate be changed

Answer 1

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answer : Doubling the Diameter increases the heat transfer rate by a factor of 4 ( B )

Step-by-step explanation:

The heat transfer in the axial direction of the cylinder can be calculated/determined as attached below

`(q_(2) )/(q_(1) ) = ((2D)^2)/(D^2)`

`q_(2)` = 4
`q_(1)` ( This shows that Doubling the diameter increases the heat transfer rate by a factor of 4 )