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