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


DELTAP = DuctBend_CL(F$, m_dot, T, P, R, D, 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)

R:  bend radius (m or ft)

D:  duct diameter (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 = 0.1 [kg/s]

T = 300 [K]

P = 100e3 [Pa]

R = 0.2 [m]

D = 0.1 [m]

alpha=65 [degree]

F$ = 'Air'

DP_Duct = ductbend_cl(F$, m_dot, T, P, R, D, alpha)



DP_Duct = 12.85 [Pa]}