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Question: problem 889 a coolant flows through a rectangular channel gallery...

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Problem 8.89 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 -90mm and b-9.5mm, and the fluid flow rate is 1.3.10-* m3/s. The coolant temperature is 15 C and the mold wall is at an approximately of 140 C Gallery coolant, Alloy melt Mold body To minimize corrosion damage to the expensive mold, it is customary to use a heat transfer fluid such as ethylene glycol, rather than process water. Compare the convection coefficients of water and ethylene glycol for this application. What is the tradeoff between thermal performance and minimizing corrosion?

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