Object 1 with a characteristic length of 0.5 m is placed in airflow at 1 atm and 20°C with free stream velocity of 50 m/s. The heat flux transfer from object 1 when placed in the airflow is measured to be 12,000 W/m2. If object 2 has the same shape and geometry as object 1 (but with a characteristic length of 5 m) is placed in the airflow at 1 atm and 20°C with free stream velocity of 5 m/s, determine the average convection heat transfer coefficient for object 2. Both objects are maintained a constant surface temperature of 120°C. Answer: 12 W/m2·K
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