A fuel cell [59] consists of air (or oxygen) and hydrogen micro ducts, separated by a membrane that promotes proton exchange for an electric current, as in Fig. P6.96. Suppose that the air side, at 20°C and approximately 1 atm, has five 1 mm by 1 mm ducts, each 1 m long. The total flow rate is 1.5E-4 kg/s.
(a) Determine if the flow is laminar or turbulent..
(b) Estimate the pressure drop. (Problem courtesy of Dr. Pezhman Shirvanian.)
