In addition to Tanay's response you can find out more about extended period simulation and tank operating range from the following articles;
Run an Extended Period Simulation (EPS)
Understanding Tank Operating Range
Hope this helps.
Bentley Technical Support
Thanks for the reply...what does warning status message Tank T-1 is emptying at 1m mean?
What is the "operating range type" for the Tank? Is it set to Levels or Elevations?
In such cases we also need to see the upstream and downstream conditions. What are the pressures in the downstream of the tank?
Better if you share the model with us.
Vishal, the model solves around the assumed boundary conditions and demands. The elevation of the junctions only allow the pressure to be calculated. For example if there is a local high point, the energy balance does not know that more head needs to be added to overcome that elevation, with potential part-full flow if an air valve is open. See more details on that here.
In your case water will flow out of the tank based on any assumed demands you have entered downstream, or assumed hydraulic grade you have defined at reservoirs or other tanks, and the model solves the energy balance around that. In your case you would see a negative pressure reported at the junction whose HGL is below the node physical elevation. More details on that can be found in this Wiki article:
Troubleshooting negative pressures at pumps, junctions, & other node elements
What this tells you is that the real system may not be able to operate and that you must change something in order to resolve the problem.
Jesse DringoliTechnical Support Manager, OpenFlows ProductsBentley Communities Site AdministratorBentley Systems, Inc.
Answer Verified By: Vishal Cn
Can u please explain how installation year affect the network performance? Or does the software doesn't take it into consideration?
Please note that the question above was split off into a separate thread here: Installation year