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3. The following Figure shows a liquid-to-air heat exchanger in which air flows at 50 m/h inside a rectangular passage and around a set of five vertical tubes. Each tube is a 1/2-in steel tube with a wall thickness of O. 049 in. The air has a density of 1.15 kg/m3 and a dynamic viscosity of 1.63 x 105 Pa.s. Compute the Reynolds number for the air flow. All dimensions in mm 96 18 12 50 Air flow between tubes

Dont know how to find wetted perimeter and area

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Dont know how to find wetted perimeter and area 3. The following Figure shows a liquid-to-air...
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