Thermal resistance for convection at outer surface of spherical shell - Heat Transfer

Q. What is the formula of the thermal resistance for convection at the outer surface of spherical shell of inner and outer radii as r_i and r_o respectively? Taking h_o as convection heat transfer coefficient of outer fluid.
- Published on 12 Aug 15

a. R_c = 4 π h_o r_o²

b. R_c = 1 / 4 π h_o r_o²

c. R_c = 4 π h_o r_o

d. R_c = 1 / 4 π h_o r_o

ANSWER: R_c = 1 / 4 π h_o r_o²

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Thermal resistance for convection at outer surface of spherical shell - Heat Transfer

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