A sphere of radius r, constant thermal conductivity k, with heat generation, is placed in a medium at T∞ with a heat tra

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A sphere of radius r, constant thermal conductivity k, with heatgeneration, is placed in a medium at T∞ with a heat transfercoefficient h. Assuming that there is a one-dimensional heattransfer, with heat generation, in a steady state, express themathematical formulation (differential equation and boundaryconditions) of this heat conduction problem