Question

Consider a flat plate subject to parallel flow (top and bottom) characterized by u. = 5 m/s, To = 20°C.

(a) Determine the average convection heat transfer coef- ficient, convective heat transfer rate, and drag force associated with an L = 2-m-long, w = 3-m-wide flat plate for airflow and surface temperatures of T, = 30°C and 80°

Answer 1

The average convection heat transfer coefficient, convection heat transfer rate, and drag force associated with a flat plate can be calculated using specific formulas and equations.

Step-by-step explanation:

Convection Heat Transfer

The average convection heat transfer coefficient, h, for a flat plate can be calculated using the formula:

h = Nu * k / L, where Nu is the Nusselt number and L is the length of the plate.

Convection Heat Transfer Rate

The convection heat transfer rate, Q_conv, is given by:

Q_conv = h * A * (T_surface - T_air), where A is the area of the plate and T_surface and T_air are the surface and air temperatures, respectively.

Drag Force

The drag force, F_drag, acting on the plate can be calculated using the formula:

F_drag = 0.5 * rho * u^2 * Cd * A, where rho is the air density, u is the velocity of the fluid, Cd is the drag coefficient, and A is the reference area of the plate.