My summary shows demand and flow in balance, but I am clearly losing volume out of storage over the duration of the simulation. Time steps of the demand pattern and the calculation options match and there appears to be no flow into reservoir elements
I believe I had stumbled across that variance previously and why I typically avoid the "all time steps" display. Using the reporting time steps only makes it easier to see that the total applied demand is the value intended.
I did some testing and it appears the "all time steps" is an average of all the reporting timesteps (the displayed time steps), not the calculated timesteps.
Also, in a model with irregular timesteps (such as a one hour calculation timestep and a few intermediate timesteps inserted at odd times like 13.15 hours), all values are included in the calculation of the average. I did some spot checks in a test model to confirm.
I added this to the article.
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.
Does reporting all time steps affect the average values displayed? I.e. is it a time weighted average, or an average of the times displayed?
Great, glad to hear it.
That T-18 element seemed to be the problem. Reworked the flow control valve arrangement to eliminate the need for that tank and the volume changes across the tanks looks to be in balance now.