Why are there so many extra element types, such as surge tank, rupture disk, Periodic head-flow?
These elements were added in version 08.09.400.34 to support the new version of our transient simulation product, HAMMER. Models developed in WaterGEMS or WaterCAD can be directly opened in HAMMER. So, the user can lay out their transient related elements in their WaterGEMS/CAD hydraulic model, open the model in HAMMER and be ready to perform a transient simulation. The user can then re-open that model back in WaterGEMS if they’d like, without losing information on the transient elements. The following is a list of transient elements and how they are handled during a WaterGEMS/CAD steady state or EPS simulation: • Periodic Head/Flow Element using Head: A reservoir with the HGL determined from the sinusoidal wave properties, or from the head pattern. Only the initial (time zero) HGL is applied so that the steady state analysis will correspond to the transient initial conditions. • Periodic Head/Flow Element using Flow: A junction with demand determined from the sinusoidal wave propertie
