Heat gain (or Loss) in steady state from Metal Rod

[tiziana]

Hello,
I got this problem but I don't know How can Find Heat loss (or gain) - Q3 - from the curved surface of the metal rod to the surrounding.

This is the problem:

A metal rod, of diameter (d) and length (L), runs between two hot walls at temperatures, T1 (Wall
1) and T2 (Wall 2), respectively. Let the thermal conductivity of the material of the rod be k, the
surface heat transfer coefficient be h, and the ambient temperature be Ta.
If d = 0.05 m, L = 0.3 m, T1 = 300 oC, T2 = 100 oC, Ta = 20 oC, k = 50 W/m/ oC, h = 40 W/m2/ oC,

Calculate the heat gain (or loss) by the metal rod from wall 1 (Q1) and wall 2 (Q2) as well
as the heat loss from the curved surface of the metal rod to the surrounding (Q3).

Could you explain me that? Thank you

 

[Nidum]

Is this a homework problem ? If so please repost in the homework section using the template supplied .

The problem itself should not be too difficult to solve . What is your level of knowledge regarding heat transfer ? Have you done any undergraduate courses dealing with the subject ?