EPANET Basic Hydrulics 02b | Hydraulic Modeling
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http://www.accu-model.com/hydraulics/...
Click here to watch a playlist of all our EPANET tutorial videos:
• EPANET Tutorial
Click here to watch a playlist of all our EPANET hydraulics videos:
• EPANET Hydraulics
In this video we show how to solve a looped pressure pipe system.
Some of the key concepts are:
First calculate the 'resistance factor' for each pipe in the system
Guess a direction of flow for each pipe
Pick a direction (clockwise or counter-clockwise) around each loop to sum the headloss
Write the headloss equation for each pipe
Write the continuity equation for each node
Guess the flow in each pipe
Compute the headloss for each pipe
Check the errors
Adjust the flow guess
Repeat the last two steps until the errors are below your chosen threshold
This type of network solution can be easily done for a very small and simple system. However, once you get more than a few loops, the solution becomes unmanageable and we need a better way which is typically a matrix solution like the one EPANET uses.
In the next post and video we will show exactly how EPANET uses matrices to solve network hydraulics.
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Additional resources:
http://www2.epa.gov/water-research/ep...
https://en.wikipedia.org/wiki/EPANET