Assumptions 1 Steady operating conditions exist. 2 The critical Reynolds number is Recr = 5×105
. 3
Radiation effects are negligible. 4 Air is an ideal gas with constant properties.
Properties The properties of air at 1 atm and the film temperature of
(Ts + T∞)/2 = (12+5)/2 = 8.5°C are (Table A-15)