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 e-mail is LMNO@LMNOeng.com and phone is (740) 592-1890. Don't have e-mail? 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.
Feburary 10, 2014 - Our 9th calculation to run on both computers and mobile devices: Force on Pipe Bend (Thrust Block Sizing)



CALCULATIONS

  Open Channels/Culverts
  Manning equation detailed calculators:
  Circular Culvert  Trapezoidal Channel 
  Rectangular Channel

  Simple Manning calculators:
Simple Manning calculator  Circular culvert geometry
Non-circular 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 discharge from water depth at channel drop-off (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 (Darcy-Weisbach)
  Liquid or gas pipe & pump curve (Darcy-Weisbach)
  Water pipe (Hazen-Williams)
  Water pipe & pump curve (Hazen-Williams)
  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:
Non-Circular to Circular Pipe Conversions
Energy Equation     Static Pressure from elevation
Minor Losses (valves, etc.)    Q = VA 
Major Losses (pipe friction). Darcy-Weisbach
Major Losses (pipe friction). Hazen-Williams
Surface Roughness and Minor Loss Coefficients
+•Moody Friction Factor for Darcy-Weisbach 
Equivalent Length of Pipe Calculations
 

Hydrology and Groundwater
  Hydrology:
  SCS TR-55 Peak discharge
  SCS TR-55 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
  3-D Slug injection: advection, dispersion
  1-D 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

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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

© 1998-2014 LMNO Engineering, Research, and Software, Ltd.  All rights reserved.

LMNO Engineering, Research, and Software, Ltd.
7860 Angel Ridge Rd.   Athens, Ohio  45701   USA   (740) 592-1890
LMNO@LMNOeng.com    http://www.LMNOeng.com

(February 10, 2014 - Our 9th mobile calculator: Force on Pipe Bend)