A long, half-round cylinder is placed in an air stream with its flat face down-stream. An electrical resistance heater inside the cylinder maintains the cylinder surface temperature at 50?C. The cylinder diameter is 5 cm, the air velocity is 31.8 m/s, and the air temperature is 20?C. Determine the power input of the heater per unit length of cylinder. Neglect radiation heat transfer.GIVENA long, half-round cylinder in an air stream with its flat surface downstreamCylinder surface temperature (Ts) = 50?CCylinder diameter (D) = 5 cm = 0.05 mAir velocity (U??) = 31.8 m/sAir temperature (T??) = 20?CASSUMPTIONSSteady stateRadiative heat transfer is negligibleFlow separates at the cylinder edges as shownbelow

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T.-50°C Alr T-=20°C U-- 30.8 m/s