Annular Rectangular Fin
Dimensional
The function eta_fin_annular_rect calculates the fin efficiency of an annular fin. The function then calls a corresponding non-dimensional function, which determines the fin efficiency. Note that the fin surface area that should be used with this fin efficiency is:
Inputs:
r_in - inner diameter of annular disk
r_out - outer diameter of annular disk
th - thickness of annular disk
h - heat transfer coefficient
k - conductivity of fin material
Example:
$UnitSystem SI K Pa J
r_in=0.01[m]
r_out=0.03 [m]
th=0.004 [m]
h=60 [W/m^2-K]
k=200 [W/m-K]
eta=eta_fin_annular_rect(th, r_in, r_out, h, k)
{Solution:
eta=0.9666}
Non-dimensional: eta_fin_annular_rect_ND(mr_out, r_in\r_out)
Function eta_fin_annular_rect_ND returns the fin efficiency of an annular fin given the product of the fin parameter, m, and out radius, r_out and the ratio of the inner to outer radii. The first parameter is defined as:
