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Hot water at 60 C enters a thin copper tube with an inside dia of 6mm and a length of 20m. The copper tube is exposed to air at 20C with a convective heat transfer coefficient of 10 W/m^2K. The Reynolds number of the flow in the tube is 1000 (laminar)
What is the mass flow rate of water?
What is the average convective heat transfer coeff on the inside of the tube?
What is the temp of the water at the outlet?
If the flow rate of the water was increased (say by 50 percent), what would happen to the convective heat transfer coeff?
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What are stress concentrations, what causes them, and why should engineers be concerned about them?
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