water at a mass flow rate of 001 kgs enters the tube having an interna

Question

Water at a mass flow rate of 0.01 kg/s enters the tube having an internal diameter of 0.02 m at 10°C. The outside of the tube is wrapped with an insulated electric heating element that produces a uniform surface heat flux of15000 W/m? on the interior surface. Water leaves the tube at 40°C. Neglecting any entrance effects, Determine the length the tube; Determine the Reynolds number; . Determine the heat transfer coefficient; . Determine the inner tube surface temperature at the exit. \text { Given: } \rho=997 \mathrm{~kg} / \mathrm{m}^{3}, c_{p}=4180 \mathrm{~J} / \mathrm{kg} \cdot \mathrm{K}, k=0.608 \mathrm{~W} / \mathrm{m} \cdot \mathrm{K}, \mu=0.91 \times 10^{-3}