Air is flowing between two infinitely large parallel plates. The upper plate is at 500 K a...

Air is flowing between two infinitely large parallel plates. The upper plate is at 500 K and has an emissivity of 0.7, while the lower plate is a black surface with temperature at 330 K. If the air temperature is 290 K, determine the convection heat transfer coefficient associated with the air.

Answer: 50.3 W/m2·K