Engine oil flows at a rate of 1 kg/s through a
Chapter 8, Problem 8.29(choose chapter or problem)
Engine oil flows at a rate of 1 kg/s through a 5-mm-diameter straight tube. The oil has an inlet temperatureof 45C and it is desired to heat the oil to a mean tem-perature of 80C at the exit of the tube. The surface ofthe tube is maintained at 150C. Determine the requiredlength of the tube. Hint: Calculate the Reynolds num-bers at the entrance and exit of the tube before proceeding with your analysis.
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