Bentley Communities
Site
Search
User
Site
Search
User
Product Communities
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Sign In
All tags
transients
Air Valves
Discharge to Atmosphere
HAMMER
inertia
pressure
PRV
pump
Pumps
Surge Anticipator Valve
surge tank
Surge Valve
surge vessel
TCV
training
Transient
Turbine
v8i
Valve Closure
water
water distribution
Water Hammer
Water Modeling
WaterCAD
WaterGEMS
WaterGEMS V8i
Hammer results File doesn't contain any transient extended node.
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
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
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
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
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
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
Career Opportunity At Aqua America, Bryn Mawr, PA - Project Engineer - Hydraulic Modeling
Jing Xiao
Please apply online and feel free to pass this message along to anyone who may have the interest. Thank you!! https://aquaamerica.wd5.myworkdayjobs.com/en-US/Aqua_America_Careers/job/PA-Bryn-Mawr/Project-Engineer-I_R672-1 GENERAL FUNCTIONS: Build…
over 3 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Transient pressure graph in an interior node of the pipe
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
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 3 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
area change modeling
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 3 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Gas volume in hydro-pneumatic tank
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
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
Re: Modeling Backflow in TCV and FCV
Jesse Dringoli
I assume you're using Bentley HAMMER. When you use a TCV or FCV, a discharge coefficient is calculated based on the head loss through the valve in the initial conditions. This discharge coefficient can be seen in the results section of the valve…
over 13 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Re: Modeling a 1.5 second valve closure at Airplane Fueling Nozzle?
Jesse Dringoli
Hello, The pumps are going to operate based on the system conditions (where the pump curve intersects the system head curve.) So, you'll need to "model what you've got" to get the right pump operating point. Meaning, if there aren't FCVs in reality…
over 13 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
HAMMER Transient Analysis and Design training course
Jesse Dringoli
Hello subscribers, We will be offering a Live training course on Transient Analysis and Design with Bentley HAMMER on November 26-29, 2012. This 16 hour course is being taught in 4 hour increments over the 4 days, from 11:00 a.m. to 3:00 p.m. EDT each…
over 10 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
How to model pump trip and restart?
Roadie
In Hammer V8i is there any way to model a pump trip/stop followed by a start? thanks.
over 11 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Transient Analysis
Sumith
Could anybody explain how could analyse the transient behavior of a pipeline in pump start up operation with partially filled & completely with water using Bently Hammer product?. I am using Bently Hammer V8 XM edition. Thanks, Sumith
over 12 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Re: Pump Inertia - relationship with pump failure & operational pattern
Jesse Dringoli
I concur with Ben. With the "Shut after time delay" transient pump type, the applied torque instantly drops to zero at the time specified in the "time delay until shutdown" field. The impeller is then subject to deceleration based on the pump inertia…
over 13 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Re: Modeling tanks inlets
Jesse Dringoli
Hello, For a steady state or EPS simulation, a top-feed tank is typically modeled by using a PSV on the upstream side. By setting the PSV to the top elevation, the HGL will be forced up to that elevation instead of the tank initial elevation.…
over 13 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Re: Hammer: Pelton free-surface tailrace surge
Matt Baird
Hi, thanks for your reply. You are correct; I am looking at the pipe carrying the water away. I have attached a basic sketch. I am modelling the pelton as a TCV followed by a D2A so I can have multi-stage valve control. Typically I would only be interested…
scheme sketch.pdf
View
Hide
over 10 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Re: Suction pipe full vacuum
Jesse Dringoli
Hello Velibor, Some of our other forum members can probably clarify this behavioir better, but I feel that it is likely 'real'. Without examining your network and results, it's hard to tell for sure, but most likely the pump station has a check…
over 14 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Control valve response to transient event
LWillnow
Is there a way to model the response of a control valve to a transient event beyond manually inputting the transient operational pattern? An example would be what happens to a PSV when the transient pressure drops below the pressure set point.
over 11 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Re: How should i enter data for air valves?
Jesse Dringoli
Hello Cesar, I assume you're referring to Bentley HAMMER V8i. When using an air valve, you must be careful to size it such that air pocket collapse doesn't cause worse pressures than without the valve at all. Animate your profile path in…
over 14 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Moment of Inertia Turbine Input - Hammer
Matt Baird
Hi I am trouble shooting a Hammer model of a hydro scheme which is producing unexpected results. I have some confusion around which inertia Hammer uses. For hydro generation applications inertia is usually given as WR2 or GD2, with GD2 being four times…
over 10 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Hammer - Modelling vertical pipes
Matt Baird
I am modelling a hydro scheme which features a vertical shaft directly at the intake. So lets says the intake is J1 at elevation 100m and drops to J2 at 50m by a 50 m length of pipe before completing a 90 degree bend to horizontal. Whe using the profile…
over 10 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
View related content throughout OpenFlows | Water Infrastructure
More
Cancel
>