LMNO Engineering, Research, and Software, Ltd.

The fluid flow calculations website
www.LMNOeng.com

Flow in pipes, open channels, hydrology, groundwater. Liquid, gas, water, air. Venturi, nozzle, orifice flowmeters. Weirs, flumes. Pipe networks, water hammer. Bernoulli, Manning, Moody. Culvert design, inverted siphon. Pressure, flow, discharge, sizing. Drag force. Tank volume, pipe volume, unit conversions.
Greetings! I am Ken Edwards, Ph.D., P.E., and owner of LMNO Engineering. My email is LMNO@LMNOeng.com and phone is (740) 5921890. Don't have email? You can still send a message. In addition to software, we provide consulting services.
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+ Indicates calculations that now run on mobile devices as well as computers.
October 14, 2014  Our 36th calculation to run on both computers and mobile devices: Compute hydraulic diameter of rectangular and annular ducts, pipes
CALCULATIONS
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
Gradually varied flow (M1, M2, S2, S3) graph
Inverted siphon for sewer going under river
+Hydraulic jump +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)
Trapezoidal, Rectangular, U (Palmer), Parshall (free flow)
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

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)
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:
+Discharge from a Tank (steady state) +Time to Empty Tank
Pipe network (12 pipes) Bypass Loop +Force due to Pipe Bend
+Bernoulli (pitot tube, pipe leak, pipe expansion/contraction)
Water Hammer (enter valve close or opening time)
Water Hammer (instantaneous valve closure)
Venturi, Nozzle, and Orifice Flow meters:
+Venturi (liquids) Nozzle (liquids)
+Orifice (liquids, D<5cm) Orifice (liquids, D>5cm)
Orifice (gases, D<5cm) Orifice (gases, D>5cm)
(D is pipe diameter)
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 •Static Pressure from elevation
+•Minor Losses (valves, etc.) +•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 Calculations

Hydrology and Groundwater
Hydrology:
+TR55 Peak discharge
TR55 Detention basin storage
+Time of concentration
+•Rational equation for peak discharge
Groundwater:
Porous bed (packed bed, permeameter)
Hydraulic gradient and flow direction from x, y, head data
3D Slug injection: advection, dispersion
1D Step injection: advection, disp, retardation

Miscellaneous
Volume of liquid in inclined cylinder at 0 to 90 degrees
+Volume of partially full cylinder on its side, Sphere, Cone
Unit Conversions
Fluid Properties +Ideal gas law for density
•Molecular Weight +•Gas Viscosity
Discussion and references for pipes, culverts
Videos / Movies
Friction loss and analysis
Tank discharge and analysis

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

View list of calculations by topic (less clutter but more clicks):
Newsletters Channels Drag Flow Flumes Forces Groundwater Hydrology Pipes RainfallMaps Statics Videos Volume Waterfall Water Hammer Weirs
© 19982014 LMNO Engineering, Research, and Software, Ltd. All rights reserved.
LMNO Engineering, Research, and Software, Ltd.
7860 Angel Ridge Rd. Athens, Ohio 45701 USA (740) 5921890
LMNO@LMNOeng.com http://www.LMNOeng.com
Site updated October 14, 2014. New mobile calculator: Compute hydraulic diameter of rectangular and annular ducts, pipes