| Product(s): |
SewerGEMS, CivilStorm, SewerCAD, StormCAD |
| Version(s): |
08.11.XX.XX, 10.XX.XX.XX |
| Area: |
Layout and Data Input |
Problem
How are Pressure Pipes and Pressure Junctions handled in different solvers of storm-sewer products?
Problem ID#: 84524
Solution
GVF-Convex - Pressure Pipes are treated as expected. Always flows full (uses EPANET engine), air valve nodes needed to model high points with part-full flow downstream.
Pressure junctions are treated as expected.
Explicit - Pressure Pipes are treated as expected. High points handled automatically. Flow can be pressure or part-full depending on the hydraulics. Pressure junctions are treated as manholes with high surcharge
Implicit - Pressure Pipes are treated as expected. High points handled automatically. Flow can be pressure or part-full depending on the hydraulics.
Pressure junctions are treated as expected.
GVF-Rational - Pressure Pipes are treated as conduits. Pressure pipe roughness is converted to conduit roughness and no pressure loops are allowed. pressure Junctions are treated as bolted manhole with a diameter set to zero. Rim elevation is set to highest crown elevation of the connected pressure pipe(s).
See Also
Differences between solvers: GVF-Convex vs. GVF-Rational vs. Implicit vs. Explicit (SWMM)