A coolant flows through a rectangular channel
Chapter 8, Problem 8.89(choose chapter or problem)
A coolant flows through a rectangular channel (gallery)within the body of a mold used to form metal injection parts. The gallery dimensions are a?90 mm andb?9.5 mm, and the fluid flow rate is 1.3?10?3m3/s.The coolant temperature is 15C, and the mold wall isat an approximately uniform temperature of 140C.To minimize corrosion damage to the expensive mold, itis customary to use a heat transfer fluid such as ethyleneglycol, rather than process water. Compare the convec-tion coefficients of water and ethylene glycol for thisapplication. What is the tradeoff between thermal perfor-mance and minimizing corrosion?
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