Aplication Hammer: in gravity flow pipe

Hello Vanfa,

What kind of transient analysis are you running? You do not need pumps in the system, though HAMMER assumes that the pipes in the system are always under pressure.

The general HAMMER FAQ page can be found here: communities.bentley.com/.../general-hammer-v8i-faq

Regards,
Scott

Vanfa, could you clarify exactly what you need help for? It sounds like you are modeling a pressurized system that flows by gravity? (based on hydraulic grade difference between tanks and/or reservoirs). Do you have a specific question about the time vs. relative closure pattern for a valve?

I encourage you to try out the Search bar at the top of the Hydraulics and Hydrology community. As you search, be sure to click the button "in hydraulics and hydrology" so that your search covers previous forum discussions as well as Support Solution articles in our wiki.

We have quite a bit of helpful content available that may answer your question. In addition to the FAQ link that Scott provided above, here are a few articles on the subject of valve closure for a transient simulation in HAMMER:

communities.bentley.com/.../modeling-reference-_2D00_-valves-of-various-types.aspx

communities.bentley.com/.../modeling-an-initially-partially-closed-valve-tn.aspx

There is an example model on valve closure included with HAMMER - see "TCV_Closure_Example.wtg" in the "Samples" folder within your HAMMER installation folder.

Furthermore, if you're new to HAMMER, the below article can be used as a guide for learning. We have quite a bit of formal training available which covers various workflows and typical modeling situations:

communities.bentley.com/.../hammer-v8i.aspx

Thank you! for you help!!

Resolve my questions!, excelent!


Regards
Vanfa