An isothermal, 100 cm × 100 cm square plate is exposed to air. The air temperature is 25°C, and the surface temperature is 45°C.  1. Assuming pure natural convection, calculate the average heat...

An isothermal, 100 cm × 100 cm square plate is exposed to air. The air temperature is 25°C, and the surface temperature is 45°C.

 1. Assuming pure natural convection, calculate the average heat transfer coefficients for three configurations:

a. Vertical

b. Inclined at 60° to the vertical, with heated surface downward

c. Horizontal, upward facing

 2. Repeat Part a assuming that the ambient air is flowing upward at a velocity of 0.1 m/s