The intake manifold of an automobile engine can be approximated as a 4 cm ID tube, 30 cm in length. Air at a bulk temperature of 20?C enters the manifold at a flow rate of 0.01 kg/s. The manifold is a heavy aluminum casting and is at a uniform temperature of 40?C. Determine the temperature of the air at the end of the manifold.GIVENAir flow through a tubeTube inside diameter (D) = 4 cm = 0.04 mTube length (L) = 30 cm = 0.30 mInlet bulk temperature (Tb,in) = 20?CAir flow rate (m) = 0.01 kg/sTube surface temperature (Ts) = 40?CASSUMPTIONSSteady stateConstant and uniform tube surfacetemperature

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Alumlnum Manlfold T, = 40°C Alr -Taou ? Toh = 20°C m-0,01 kg/s D=4 cm L= 30 cm