• STREETER BOOK WORKED EXAMPLE AND HAMMER RESULTS-DIFFERENCES IN MAXIMUM TRANSIENT PRESSURE

    Hello, I found the example 3-1 on the Streeter book "Fluid Transients" (2004) it consist in a pipeline of 600 m length, 0.5 m diameter, Darcy friction factor 0.018, reservoir with 150 m hydraulic grade and a valve that close in 2,3 seconds, following…
  • Behavior of pump in the case of Valve closure is not clear

    I am modelling a system, and one of the scenarios is an emergency shutdown of the flow control valve (FCV) downstream of the pump as shown in the following image: the FCV is modelled as a throttle control valve (TCV) with the properties of the original…
  • problem w/ TCV during transient analysis

    i defined an operational pattern for a TCV to simulate gradual valve throttling, but the transient model yields unexpected results. The pattern starts at 0% relative closure and gradually (in one second intervals) ramps closed (in 10% increments), so…
  • Re: Valve closure (transient) modelling in Hammer

    Hello Sukru, The reason why you see those fields in the Lesson2_WaterGEMS.wtg file is because that file is configured to have user defined initial conditions specified. This is designated by the setting of "true" for the attribute called "Specify…
  • Valve closure modeling in Hammer

    Hi I am trying to simulate a pumping main from a low elevation sump to a high elevation sump (HES). To simplify the system practically i am planning on using a altitude valve at the HES, so when the HES is filling to top level the altitude valve will…