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อัปเดต 2026-09-07
Junction & demand
interior node / draw
An interior node where pipes meet. It can carry a demand (a fixed draw or supply) or be a pure connector with zero demand.
เมื่อไรจึงใช้
- Any tee, branch, or connection point inside the network.
- A consumer draw (positive demand) or a distributed supply (negative demand) at a known flow.
ค่าที่ต้องกรอก
| ค่า | คำอธิบาย |
|---|---|
| Demand | Volumetric draw (+) or supply (−). Zero = pure connector. |
| Elevation | Node elevation — sets the static-head reference for pressure. |
คำนวณอย่างไร
Continuity (Σ flows in = demand out) is enforced at every junction; the GGA solves the coupled head/flow system so all junction balances close simultaneously.
ข้อควรระวัง
noteA degree-1 junction with a demand is auto-reclassified to an open pipe on load — use Assign-Flowrate for an end-of-line draw so the demand survives.
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