Open Channels / Culverts
Manning Equation Detailed Calculators:
+Circular culvert
+Trapezoidal channel
+Rectangular channel
Simple Manning calculators:
•Simple Manning calculator
•Circular culvert geometry
•Noncircular channel geometry
•Mannings n Coefficients
•Q = VA
Specialty Programs:
+Culvert design using inlet and outlet control (graph, chart)
+Gradually varied flow (M1, M2, S2, S3) graph and table
+Inverted siphon for sewer going under river
+Hydraulic jump in a pipe
+Hydraulic jump horizontal rectangular channel
+Critical depth in circular culvert
+Bernoulli (pitot tube, dam, sluice gate)
+Discharge from a tank (steady state)
+Time to empty tank
Flumes:
+Parshall (submerged and free flow) graph, table
+Trapezoidal, rectangular, U (Palmer), Parshall (free flow) graph, chart
Weirs:
+Rectangular
•V notch
•Cipoletti
Compute Waterfall Discharge at Channel DropOff (End Depth):
+Circular culvert
•Rectangular channel
•Triangular channel
Drag Force
+Drag force on hemispheres, cone, ellipsoid, annular disk, cylinder, rod, cube
+Drag force  you enter drag coefficient
Riprap
+Riprap rock sizing

Pressurized Conduits
Single pipes and tubes:
+Liquid or gas pipe (DarcyWeisbach)
+Liquid or gas pipe & pump curve (DarcyWeisbach)
+Water pipe (HazenWilliams)
+Water pipe & pump curve (HazenWilliams)
Compressible (gases):
+Weymouth, Panhandle A (and B) equations (compressible gases)
+Choked flow of gas from tank through pipe
+Rayleigh flow (compressible with heat transfer but frictionless)
Specialty Programs:
+Bernoulli (pitot tube, pipe leak, pipe expansion/contraction)
+Bypass loop
+Discharge from a tank (steady state)
+Fire hydrant
+Force due to pipe bend
+Liquid leak rate from pipe crack
+Pipe network (12 pipes)
+Pressure relief valve sizing
+Time to empty tank
+Water hammer (enter valve close or opening time)
+Water hammer (instantaneous valve closure)
Venturi, Nozzle, and Orifice Flow meters (D is pipe diameter):
+Venturi (liquids)
+Nozzle (liquids)
+Orifice (liquids, D<5cm)
+Orifice (liquids, D≥5cm)
+Orifice (gases, D<5cm)
+Orifice (gases, D≥5cm)
Properties of Gases:
+Specific gravity conversions and density using ideal gas law
+Gas flow conversions (mass, standard, actual)
•Molecular weight
•Gas viscosity
Simple Programs:
•Noncircular to circular pipe conversions
•Energy (Bernoulli) equation
•Pressure drop in horizontal pipe (laminar flow)
•Pressure loss in horizontal pipe (4000≤Re≤10^{5})
•Static pressure from column height
•Minor losses (valves, etc.)
•Convert discharge coefficient to minor loss coefficient
•Q = VA
•Major losses (pipe friction). DarcyWeisbach
•Major losses (pipe friction). HazenWilliams
•Surface roughness and minor loss coefficients
•Moody friction factor for DarcyWeisbach
•Equivalent length of pipe calculator

Newsletters
(Fluid flow articles written by Ken Edwards, Ph.D., P.E., Owner of LMNO Engineering)
1999 2000
2001 2002
2003 2004
2005 2006, 2007, 2008, 2009, 2010, 2012
2013, 2014, 2015, 2016, 2017, 2018, 2019
