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Water at 15°C enters a tube of 2 cm of diameter with flow rate 3953 kg/h....

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Mechanical Engineering

Water at 15°C enters a tube of 2 cm of diameter with flow rate3953 kg/h. Assume the ratio L/D >10, and the wall temperature isconstant at 80◦C. The outlet temperature is 50°C The properties ofwater at the film temperature are density rho = ? = 985 ?/?3,specific heat ?p = 4180 ?/?, conductivity ? = 0.651 ?/?, dynamicviscosity mu= ?? = 4.71 × 10−4 ?/?, At the wall temperature of 80°Cwe have dynamic viscosity muw= ?? = 3.55 × 10−4?/?

1. Calculate the average velocity, ?

2. Calculate Reynolds number ?e?

3. Determine the flow regime

4. Calculate Prandtl number ?r

5. Calculate the rate of heat transfer, ?

6. Calculate the mean temperature ??

7. Calculate Nusselt number ?u?

8. Calculate convection heat transfer coefficient â„Ž

9. Calculate the length of the tube ?

10. Calculate the ratio ?/D

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