LMNO Engineering, Research, and Software, Ltd.

Fluid Flow Calculators and Consulting
www.LMNOeng.com

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 (new layout)

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 Drop-Off (End Depth):

+Circular culvert

•Rectangular channel

•Triangular channel

Riprap

+Riprap rock sizing

Drag Force

+Drag force on hemispheres, cone, ellipsoid, annular disk, cylinder, rod, cube

+Drag force - you enter drag coefficient

Hydrology and Groundwater

Hydrology:

+TR-55 peak discharge

+TR-55 detention basin storage

+Time of concentration (new layout)

•Rational equation for peak discharge (new layout)

+Water Quality Volume

Groundwater:

+Darcy's Law (packed bed, permeameter)

+Hydraulic gradient and flow direction from x, y, head data

+3-D slug (pulse) injection: advection, dispersion

+1-D step injection: advection, disp, retardation

+ Drawdown for unsteady groundwater flow to a pumping well in a confined aquifer (Theis Well function calculator)

• Aquifer transmissivity T=Kb (and K table) (new layout)

Pressurized Conduits

Single pipes and tubes:

+Pipe flow - liquid or gas (Darcy-Weisbach)

+Pump curve calculator - liquid or gas pipe (Darcy-Weisbach friction)

+Water pipe (Hazen-Williams friction)

+Pump operating point - water pipe (Hazen-Williams friction)

Compressible (gases):

+Weymouth, Panhandle A (and B) equations (compressible gases)

+Choked flow of gas from tank through pipe

+Gas leak rate through hole

+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 (new layout)

Simple Programs:

•Non-circular to circular pipe conversions

•Energy (Bernoulli) equation

•Pressure drop in horizontal pipe (laminar flow) (new layout)

•Pressure loss in horizontal pipe (4000≤Re≤10⁵) (new layout)

•Static pressure from column height

•Minor losses (valves, etc.)

•Convert discharge coefficient to minor loss coefficient

•Q = VA (new layout)

•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 calculator

Miscellaneous

+Volume of liquid in inclined cylinder at 0 to 90 degrees (graph, table)

+Volume of partially full cylinder on its side, sphere, cone

•Unit conversions

•Fluid properties

•Discussion and references for pipes, culverts

Videos / Movies

•Friction loss and analysis

•Tank discharge and analysis