Change in convection resistance wrt outer radius of hollow cylinder - Heat Transfer

Q.  What is the effect of change in outer radius of the hollow cylinder on the thermal resistance of convection?
- Published on 12 Aug 15

a. the thermal resistance of convection increases with increase in outer radius of the hollow cylinder
b. the thermal resistance of convection decreases with increase in outer radius of the hollow cylinder
c. the thermal resistance of convection remains same with change in outer radius of the hollow cylinder
d. unpredictable

ANSWER: the thermal resistance of convection decreases with increase in outer radius of the hollow cylinder

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