A hot fluid passes through a thin-walled tube of 10-mm diameter and 1-m length, and a coolant at T = 25°C is in cross flow over the tube. When the flow rate is m = 18 kg/h and the inlet temperature is Tm,i = 90°C, the outlet temperature is Tm,o = 78°C. Hot fluid m Tmi Coolant Tube, D, L Tmo Assuming fully developed flow and thermal conditions in the tube, determine the outlet temperature, Tmo, if the flow rate of the hot fluid is increased by a factor of 4. That is, m = 72 kg/h, with all other conditions the same. The thermophysical properties of the hot fluid are p = 1079 kg/m³, cp = 2637 J/kg-K, μ = 0.0034 N-s/m², and k = 0.261 W/m.K.

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Forming and Shaping

Metal forming is a category of metalworking process through which the material can be given the desired shape and size by subjecting it to plastic deformation, where the component undergoes bulk deformation process upon application of loads. Unlike the shearing and machining process, the material does not undergo up to a failure point as indicated in the stress-strain curve. Hence, the stresses induced during the forming process are greater than yield strength but less than the failure strength of the material. The process does not lead to the loss of material, so it can be said to be an economical process. During forming, the material is subjected to tensile forces, compressive forces, bending, and shearing loading conditions. The material should possess the property of ductility to undergo the forming process.