Returns the pressure drop associated with a supply duct with a branch.  The branch is at 90 degrees and the ducts have circular cross-section.  The pressure drop should be applied to the flow in the branch.  The function calls the K_supply_branch_90 function from the minor loss library.


DELTAP = DuctSupplyBranch90_CL(F$, m_dot_3, m_dot_1, T, P, A_3, A_1)



F$:  fluid string identifier

m_dot_3:  mass flow rate in main duct upstream of branch (kg/s, lbm/hr)

m_dot_1:  mass flow rate in branch (kg/s, lbm/hr)

T:  inlet temperature (K, C, F, or R)

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

A_3:  upstream duct area (m^2 or ft^2)

A_1:  branch duct area (m^2 or ft^2)



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



$UnitSystem SI Mass J K Pa Degree

$Load Component Library

$VarInfo DP_duct units=Pa


m_dot_3 = 0.5 [kg/s]

m_dot_1 = 0.1 [kg/s]

T = 300 [K]

P = 100e3 [Pa]

A_1 = 0.05 [m^2]

A_3 = 0.2 [m^2]

F$ = 'Air'

DP_Duct = DuctSupplyBranch90_cl(F$, m_dot_3, m_dot_1, T, P, A_3, A_1)



DP = 2.511 [Pa]}