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Pipe Flow

Steady state pressurised & non-pressurised linear pipesystem calculator.


  • Interactive visualisations of surface profile and head discharge.

  • Full implementation of gradually varied flow equations and hydraulic jump.

  • Download all your results, including extensive quality assurance documentation (Premium users only).


input data

Input

Entrance Section Details

This describes the inlet configuration to allow calculation of headwater and head loss at the entrance.


Type Detail


Section Input

This describes the properties of the pipe section.


Type Size Length (m) Elevation (mAOD)
Downstream Section
TransitionIf there is a difference in downstream pipe size this describes the transition and is used to calculate the resulting minor loss coefficient. Warning if not set to none this automatically updates the Manning's n value to account for the additional minor loss.
Roughness
Diameter (m) Height (m) Width (m)
US ILUpstream Invert Level: Elevation of the bottom of the pipe at the pipe entrance
DS ILDownstream Invert Level: Elevation of the bottom of the pipe at the pipe exit
Ks (m)Absolute Roughness: a measure of surface roughness of a material
nManning's Characteristic Roughness
KMinor Loss Coefficient: For approximating impact of bends, manholes, valves etc



Downstream Section Details

This describes the properties downstream and allows the calculation of the tailwater.


Free Discharge         Fixed Height         Trapezoidal Channel Section

Flow Details

The allows control over the coverage of the head discharge curve, WARNING: the more flow rates the longer the calculations will take.


Kinematic Viscosity (m2/s):

Minimum Flow (m3/s):     Maximum Flow (m3/s):    
Number of Flow Rates: This is the total number of calculations to be undertaken and will produce n-2 flow rate calculations between the minimum and maximum.


Pipe Profile Graph

Adjust the flow rate using the slider → Use shift to pan → Click and drag to zoom → Double click to refresh view.


Hydraulic Grade Line:
0.000
mAOD
     
Depth:
0.000
m
     
Velocity:
0.000
m/s
     
Froude No:
0.000



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Head Discharge Graph

Use shift to pan → Click and drag to zoom → Double click to refresh view.





Head: m
     

Inlet Control:
0.000
m
     

Outlet Control:
0.000
m
     

Discharge:
0.000
m³/s
     

Summary Table

Adjust the flow rate using the slider




Section Type Length (m) Rise (m) Slope Normal Depth (m) Critical Depth (m) Flow Profile


Create Report


Customise quality assurance report header.
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Job No:
Revision:
Job Title: Author:
Calculation: Date:


Enter desired flow rate:

m³/s