# Question: consider a tube of inside radius r1 and outside radius...

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consider a tube of inside radius r1 and outside radius r2. Boiling water at a saturation temperature of 100oC flows inside the tube while heat is dissipated from the outside surface by convection with a heat transfer coefficient of 15W/m2.oC into ambient air at a temperature of 20oC.(a) write the boundary conditions for the boundary surfaces at r1 and r2, and (b) drive the temperature distribution equation for this problem