Mismatches between "Transients results viewer" and "Profiles". HAMMER V8i

Question

Hello, 
 I am working on the effects of a pump shut down in a quite long pressurized main with HAMMER V8i. 
 My model consists of 3 pumps that deliver 120l/s to a distance of 1800m through a 250mm main. As usual, the main has a very steeped start to exit the sump (the sump has a depth of around 20m) and afterwards, the profile is near flat. The steady-state total head is about 70m. 
 I perform an scenario in where I introduce just check valves at the top of the sump and I am getting curious results: 
 After the shut down, the flow begins to fall and a vapor pocket starts to open at the high point. After a few seconds, this pocket collapses causing an upsurge all along the pipe downstream the check valves. Up to this point everything seems to be normal. 
 When the flow starts to reverse, the check valves close. And logically, as the sump is quite deep, the 20 m column of water cannot withstand the pressure and starts vaporizing. The "transient results viewer" shows this vapor volume, so does the data table. The weird thing is that this vapor volume (the one upstream the valves) does not appear in the "profiles" graphs ("air volume" and "vapor volume" boxes under "results (transient)" are checked). 
 I would really appreciate some advice whether I'm wrong about my thoughts or I'm doing something incorrectly. 
 I have avoided the actuation of the built-in check valves at the pumps by selecting "control valve" with a high closure time (99,999 seconds). 
 
 Alberto.

Jesse Dringoli · Accepted Answer

Hello Alberto, 
 As you've noticed, there appears to be a slight reporting issue in the profile that you see under View > Profiles. When using the check valve node element (which I assume you're referring to), if a vapor pocket forms directly at the check valve, the maximum volume isn't displaying in the statistical field "Vapor Volume (maximum)". I've reported this to development (the reference number for that is Defect # 129714) 
 Note however that the profiles seen under View > Profiles typically aren't used with a transient analysis. They are available in HAMMER in part due to the shared functionality with WaterCAD and WaterGEMS (for steady state and Extended period simulations) 
 The profile function in the Transient Results Viewer is the preferred approach for viewing transient results, due to several reasons. In particular, you can see results between the nodes (along the pipe length). For example the profiles under View>Profiles would not show a vapor pocket if it occurred somewhere along a pipe, between two nodes. Also, with the transient results viewer profiles, you can animate the path (if the "generate animation data" calculation option is set to "true") and get a deeper understanding of how things are interacting during the transient simulation.