• How does HAMMER calculate vapor pocket formation and collapse?

    Jesse Dringoli
    Jesse Dringoli
    Applies To Product(s): HAMMER Version(s): All Area: Calculations Original Author: Jesse Dringoli, Bentley Technical Support Group Problem How does HAMMER calculate vapor pocket formation and…
    • 10 months ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
  • HAMMER Transient wave reflection behavior for different boundary conditions

    Jesse Dringoli
    Jesse Dringoli
    Product(s): HAMMER Version(s): CONNECT Edition Area: Calculations Problem During a transient simulation in HAMMER, how do transient waves reflect off different boundary conditions, such as demands, reservoirs or dead ends…
    • 6 months ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
  • Hammer results File doesn't contain any transient extended node.

    aqeel ahmad
    aqeel ahmad
    Hi, I am new to Bentley Hammer. I am analyzing a Gravity pipeline where water will run from 1619 m elevation to 1400 m elevation in a hilly area with ups and downs. When I check " Transient Results Viewer" it gives a dialogue box. "The hammer results…
    • over 1 year ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • inserimento air valve dopo evento transitorio arresto pompa (ho bisogno di aiuto)

    Giovanni Stabile
    Giovanni Stabile
    buongiorno, dopo tante domande siamo quasi arrivati alla fine del problema. Dopo aver calcolato un'analisi transitoria di arresto di una pompa con numero di giri variabile ho problemi relativi alla cavitazione e quindi ho inserito dove ho questi problemi…
    • over 1 year ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • evento transitorio spegnimento pompa velocità variabile

    Giovanni Stabile
    Giovanni Stabile
    buonasera, ho riscontrato due errori in questa simulazione: 1) problema cavitazione 2) analizzando i risultati dell'analisi ho notato che le portate (flow) delle tubazioni a valle della pompa spenta non tendono mai a 0 ho pensato: per risolvere…
    • over 1 year ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • modeling a pump start-up transient event in hammer (need help)

    Giovanni Stabile
    Giovanni Stabile
    I have an in-line pumping system and I wanted to simulate the pump start-up , I set the problem as in the various examples present in the comunity, but the result of the analysis is "wave speed must be greater than zero". What could be the problem?…
    • over 1 year ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • Determining the occurrence time for max and min transient pressure at all nodes

    akash-subudhi akash-subudhi
    akash-subudhi akash-subudhi
    I have carried out transient simulation for an irrigation network. Based on client requirement, I want the occurrence time of the maximum and minimum transient pressures at all junctions. How can we extract this information that at what instant/time we…
    • over 3 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • Como superar o mejorar las presiones negativas en las " presión extrema cabezales"(extreme pressure and heads)

    Jesús Bayona Perez
    Jesús Bayona Perez
    Hola, tengo presiones negativas en las "presión extrema cabezales"(extreme pressure and heads),el sistema es un modelamiento transitorio en HAMMER(adjunto archivo) Ademas me sale este mensaje 44845 "Con tanque unidireccional" "Pipe" "209" "LINEA…
    • over 3 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • Transient pressure graph in an interior node of the pipe

    Hiwa
    Hiwa
    Hi, How can I draw a transient pressure graph (pressure data against time) in an interior node of a pipe? Thanks
    • Answered
    • over 3 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • Error: Initial flow is zero, which would result in a discharge coefficient equal to 0, which is not allowed

    Gustavo Montero
    Gustavo Montero
    Good Afternoon: I am trying to model an irrigation net with a pump, reservoir an irrigation net where all are connected. My particular situation to model is: No demand in any hydrant Pump working from the river to the reservoir Pump shot down…
    • over 4 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • area change modeling

    mohamed tablia
    mohamed tablia
    Hello, how could I model area change in bentley hammer ? Is there any method rather than splitting pipe? does pipe splitting do better simulation for Wave Reflection and Transmission at an expansion and a contraction?
    • over 4 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • Gas volume in hydro-pneumatic tank

    Velibor Kosanovic
    Velibor Kosanovic
    Hello forum, I'm having doubt (due to client "inquiries"), therefore I'm addressing this question to you all. I'm using sealed, gas-law model, hydropneumatic tank element, to model the surge vessel. Total volume is 200m3 and initial gas volume is…
    • Answered
    • over 4 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • Getting reliable results from Bentley Hammer

    Hiwa
    Hiwa
    Hi, I am modelling a simple system to compare the results to some codes that I have. But, despite having all the configurations similar to codes, I cannot get similar pressure fluctuation. Could you please have a look and let me know the reason? …
    • Answered
    • over 4 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • Modeling Reference - Surge Tanks

    Jesse Dringoli
    Jesse Dringoli
    Product(s): HAMMER Version(s): CONNECT Edition, V8i Area: Modeling Overview This tech-note discusses how to configure the Surge Tank element for transient analysis in HAMMER. Background A Surge Tank (also known as a …
    • 7 months ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
  • Negative pressures occur during a transient simulation no matter what protection is used

    Jesse Dringoli
    Jesse Dringoli
    Applies To Product(s): HAMMER Version(s): V8i, CONNECT Edition Area: Modeling Original Author: Jesse Dringoli, Bentley Technical Support Group Problem When computing a transient simulation…
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
  • Modeling demand patterns (change in outflow) during a transient simulation in HAMMER

    Jesse Dringoli
    Jesse Dringoli
    Applies To Product(s): Bentley HAMMER Version(s): 08.11.xx.xx Area: Modeling Original Author: Scott Kampa, Bentley Technical Support Group How To How to model demand patterns in Bentley HAMMER…
    • over 6 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
  • Easily reuse WaterCAD and WaterGEMS models for a transient analysis in HAMMER

    Jesse Dringoli
    Jesse Dringoli
    Have you ever wanted to perform a transient analysis on a water network that you've designed? Did you know that you can configure the transient analysis while you design the steady state/EPS water model in WaterCAD or WaterGEMS, then directly open the…
    • over 6 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Blog
  • What can cause a transient wave to dampen?

    Jesse Dringoli
    Jesse Dringoli
    Product(s): Bentley HAMMER Version(s): 08.11.XX.XX Environment: N\A Area: Calculations Problem What causes transient waves to dampen? According to the Help and the Advanced Water Distribution Modeling…
    • over 7 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
  • Converting a PRV PSV or FCV to a Throttle Control Valve (TCV) in HAMMER

    Jesse Dringoli
    Jesse Dringoli
    Applies To Product(s): HAMMER Version(s): V8i, CONNECT Edition Area: Modeling Original Author: Scott Kampa, Bentley Technical Support Group Overview This TechNote will describe steps to model…
    • over 5 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
  • What's new in HAMMER V8i SELECTseries 2?

    Yashodhan Joshi
    Yashodhan Joshi
    Product(s): HAMMER Version(s): V8i SELECTseries 2 (08.11.02.31) Area: N/A Overview The SELECTseries 2 release of HAMMER V8i includes many new features and improvements. This technote explores each change. - Support for…
    • over 4 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
  • Modeling Reference - Discharge To Atmosphere

    Jesse Dringoli
    Jesse Dringoli
    Product(s): HAMMER Version(s): CONNECT Edition, V8i Area: Modeling Overview This TechNote explains how the Discharge to Atmosphere (D2A) element works and its typical application in transient simulations in HAMMER. The example…
    • 11 months ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
  • Modeling Reference - Valve Closure

    Luca Santos Billis
    Luca Santos Billis
    Applies To Product(s): HAMMER, WaterGEMS, WaterCAD Version(s): V8i, CONNECT Edition Area: Modeling Original Author: Jesse Dringoli, Bentley Technical Support Group Overview This technote explains…
    • 3 months ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
  • Modeling Reference - Surge Valves

    Scott Kampa
    Scott Kampa
    Product(s): HAMMER Version(s): CONNECT Edition, V8i Area: Modeling Original Author: Jesse Dringoli, Bentley Technical Support Group Overview This TechNote explains how the surge valve element works and its typical application…
    • 12 days ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
  • Modeling Reference - Air Valves

    Jesse Dringoli
    Jesse Dringoli
    Applies To Product(s): HAMMER Version(s): V8i, CONNECT Edition Area: Modeling Original Author: Jesse Dringoli, Bentley Technical Support Group Overview This TechNote explains how the Air Valve…
    • 2 months ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
  • HAMMER General FAQs

    Sushma Choure
    Sushma Choure
    This is a list of articles containing general FAQs for Bentley WaterGEMS and WaterCAD products. To search within this page, press [Ctrl]+F. Calculations Estimating pump specific speed Transient Force Calculations Input & Modeling What…
    • over 3 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Wiki
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