Building & running a transient model

✏️Course in Development

Just a heads-up—this section is still a work in progress! I’ll be revising and expanding it soon to make sure it’s as useful as possible. Curious about what’s already done or currently in the works? Check the changelog for updates.

So, you're ready to perform a transient analysis. What specific information do you need to build your model, and how does it differ from what you're used to for steady-state or EPS simulations? This section will cover these crucial additional data requirements. While your basic network topology (pipes, junctions, reservoirs) remains similar, transient models need much more detail about certain components.

For example, you'll need detailed valve closure or opening characteristics — not just "open" or "closed," but how the valve's discharge coefficient or effective area changes over time during its operation (often represented as a time-stroke curve or a time-discharge coefficient curve). For pumps, their rotational inertia (often given as WR2 or GD2) becomes critical for simulating how they run down after a power trip.

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