A spherical coordinate (r = radius, T = temperature and t = time), the heat conduction equation in steady state is
A. $$\frac{\partial }{{\partial r}}\left( {{r^2}.\frac{{\partial T}}{{\partial r}} = 0} \right)$$
B. $$\frac{\partial }{{\partial T}}\left( {{r^2}.\frac{{\partial T}}{{\partial r}} = 0} \right)$$
C. $$\frac{\partial }{{\partial r}}\left( {{T^2}.\frac{{\partial T}}{{\partial r}} = 0} \right)$$
D. $$\frac{\partial }{{\partial t}}\left( {{r^2}.\frac{{\partial T}}{{\partial r}} = 0} \right)$$
Answer: Option A
This Question Belongs to Metallurgical Engineering >> Miscellaneous In Metallurgy
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