A furnace heat exchanger has a cross section like that shown in Fig. 9.28. The air flows around the three thin passages in which hot gases flow. The air is at 140°F and has a density of 2.06 × 10^-3slugs/ft³and a dynamic viscosity of 4.14 × 10^-7lbˆ™s/ft². Compute the Reynolds number for the flow if the velocity is 20 ft/s.

Transcribed Image Text:

28 in 2 in typical Air 8 in 14 in