Returns the pressure drop in a rectangular duct bend given the fluid, its flow rate and state, the width and height of the duct, the bend radius, and the turning angle.  This function calls the function K_Bend_Rect from the minor loss category of the heat transfer library.


DELTAP = DuctBend_Rect_CL(F$, m_dot, T, P, b, W, r, alpha)




F$:  fluid string identifier

m_dot:  mass flow rate (kg/s, lbm/hr)

T:  inlet temperature (K, C, F, or R)

P:  inlet pressure (bar, atm, Pa, kPa, or MPa)

b:  duct width (m or ft)

W:  duct height (m or ft)

r: turning radius (m or ft)

alpha:  turning angle (radian or degree)



DELTAP:  pressure drop (bar, atm, Pa kPa, or MPa)



$Load Component Library

$UnitSystem SI Mass J K Pa Degree

$VarInfo DP_Duct  units=Pa


m_dot = 0.25 [kg/s]

T = 300 [K]

P = 100e3 [Pa]

b = 0.2 [m]

W = 0.1 [m]

r = 0.15 [m]

alpha=65 [degree]

F$ = 'Air'

DP_Duct = ductbend_rect_cl(F$, m_dot, T, P, b, W, r, alpha)



DP_Duct = 10.72 [Pa]}