Chapter 1, Problem 1.2DP

Problem: Convection related   Air at atmospheric pressure and a temperature of 25°C is in parallel flow at a velocity of 5 m/s over a 1‐m‐long flat plate that is heated from below with a uniform heat flux of 1,250 W/m^2. Assume the flow is fully turbulent over the length of the plate.   (a) Calculate the plate surface temperature, Ts(L), and the local convection coefficient, hx(L), at the trailing edge, x = L.     (b) Calculate the average temperature of the plate surface, T¯s.     (c) Plot the variation of the surface temperature, Ts(x), and the convection coefficient, hx(x), with distance on the same graph. Explain the key features of these distributions.

Qi/ An Aluminum flat plate has a continuous and smooth surface over which the air flows at 2 m/s. The plate consists of 25 part that each part is 10 mm long with 0.2 m width. During operation, each part is maintained at 500°C and the air is at 25°C. What is the rate of convection heat transfer from the first part? The sixth part? All the plate?