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K_tee_straight
The K_tee_straight(RelRough) function returns the resistance coefficient for standard T with flow straight through (i.e., not through the branch). The relative roughness must also be supplied as a parameter. This parameter can range between 0 (for smooth tubes) to 0.05 (for very rough tubes.) The dependence of relative roughness indicates that the resistance factor is applicable to turbulent flow.
Example:
$UnitSystem SI K Pa J
$VarInfo DELTAP units=Pa
$VarInfo h_L units=m
RelRough=0
K=k_tee_straight(RelRough)
V_tilde=10 [m/s]
rho=1000 [kg/m^3]
g=g#
h_L=K*V_tilde^2/(2*g)
DELTAP=h_L*rho*g
{Solution:
DELTAP=6028 [Pa]
h_L=0.6146 [m]
K=0.1206
}
Reference:
Flow of Fluids Through Valves, Fittings, and Pipe, Crane Valves North America, Technical Paper No. 410M. 1979, p A-29
Minor Losses Index