When running Extended Period Simulations (EPS), the occurrence of the “Cannot Solve Equations” error currently causes the entire simulation to fail, with no access to results from the timesteps that were successfully solved prior to the error. It ...

Multispecies models (MSX) often require long simulation times to initialize the system. With some system models, piggy backing the next simulation with the initial conditions being the final results from the last run can allow for even longer simu...

In HAMMER/OpenFlows, relief/surge valves are typically modeled as discharging to atmosphere, or with logic that does not adequately represent “in-line” relief valves (between two pipes) whose actuation depends on the pressure differential between ...

WaterGems fire flow analysis gives the flow at points to bring the pressure down to 20 psi or the flow which will reduce the pressure elsewhere to 20 psi, whichever flow is least. That analysis predicts what flows can be potentially extracted from...

Currently, during an available fire flow run, if a node is unbalanced, a resulting available fire flow gets reported, which appears to be the result of the last iteration (even if the run is unbalanced). This can lead to an erroneous interpretatio...

It is sometimes necessary to view the average flow through an element. It's a strange ommission that min and max flow fields are available from Results (statistics) group, but average flow is not.

The discrete gas cavity model is used in other transient analysis software and is described in various texts such as Thorley. It captures variable wavespeed phenomenon due to changing air pocket volume. It has been observed that models which exper...

In our system we have hundreds of physical customer meters that report hourly pressure. I have these in the model as SCADA elements and they are very useful but... the SCADA elements can only be associated with a junction somewhere else, so the el...

The functionality of rearranging entries individually is not present in: Selection Sets, FlexTables, Profiles, Queries, Scenarios (on the same level), Alternatives (on the same level) and probably a few that I'm missing. For some of these there is...

Summary: Enable defining a calculation start time based on a time from start (can be > 24 hrs, e.g., T = 82 hrs), instead of a clock time (has to be 00 hrs to 23 hrs) (see attached figure). Model Setup Information: Our model has 7-day (168 hrs)...