Consider a rectangular duct with a width of 4 µm and height of 2 µm, and length of 80 µm. Air, at an inlet pressure of 1 bar and an inlet temperature of 300 K, flows through this tube with a constant...

Consider a rectangular duct with a width of 4 µm and height of 2 µm, and length of 80 µm. Air, at an inlet pressure of 1 bar and an inlet temperature of 300 K, flows through this tube with a constant surface heat flux of 75 kW/m². Air velocity at inlet is 150 m/s

(a) Verify whether the slip flow regime applies to this problem.

(b) Find
using Eq. (13.7.15) and Eq. (13.8.1). Compare the results from these equations with Fig. 13.15.

(c) Find the mean temperature of the fluid and duct surface temperature at outlet

(d) Find the heat transfer coefficient, h_Dh, if there is a constant