General / HVAC
Simple Loop
A closed recirculating loop: a reservoir tank, a circulator pump and three elbows in a ring of 1-inch copper. With no open boundary, every metre of pump head is spent on friction — the solver finds the circulation rate where the pump curve balances the loop's resistance.
It is the simplest network that a single hand calculation cannot quite do honestly: the flow depends on the head, and the head on the flow. The solver iterates both together.
Solved results — Incompressible solver, 6 iterations
| Circulation flow | 0.4755L/s |
| Loop velocity | 0.8932m/s |
What this example shows
- Closed loop — no boundary, pure pump-vs-friction balance
- Copper tube with Crane TP-410 auto elbows
Explore it yourself
Open the solved model in the browser sandbox — no account needed — or create a project from this template to modify and re-run it.