Contents
- Index
K_Reentrant_Pipe_Inlet
The resistance coefficient for a reetrant pipe inlet is approximately 0.8 provided that t<<D and l is approximately 0.1D.
Example:
$UnitSystem SI K Pa J
t=0.002 [m]
l=0.01 [m]
D=0.10 [m]
K=K_Reentrant_Pipe_Inlet(l, t, D)
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=40000 [Pa]
h_L=4.079 [m]
K=0.8
}
Notes:
A warning will be issued if t/D>0.02 or if l/D>0.125 or l/D<0.075.
Reference:
Cengel and Cimbala, Fluid Mechanics, Fundamentals and Applications,McGraw-Hill, 2006
Page A-29 of Crane, "Flow of Fluids through Valves, Fittings and pipe", Technical Paper No. 410M, Crane Co, NY, 1979
Minor Losses Index