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.
Purchase PIN for calculations About LMNO Engineering/Consulting About calculations, viewing, printing Links
Red Dot (•) calculations are free.
Red Caret calculations (^) use Java and do not run on some computers and most mobile devices.
July 3, 2015  We slightly changed the look of the website.
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 Column Height
•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
© 19982015 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 July 3, 2015. Inserted red caret (^) next to Java calculations. New photo.