• Wave speed for a pipe with a flexible internal liner system

    Hi I'm looking for any guidance / experience in calculating wavespeed and considering transient performance in a section of asbestos cement pipe pipe which will be re-lined using a flexible liner system. The liner product is semi-structural and inserted…
  • Wavespeed/length adjustment

    Hi, If I'm trying to put actual topology, there are many places where there is considerable elevation difference ( 1 to 2 mtrs.) within a short distance 5-20 metres. In such cases model is giving warning of excessive length or wavespeed adjustment.…
  • SCRC Pipe

    Hi, In our network there are SCRC (Steel Core/Cylindre Reinforced Concrete) pipes. While selecting the pipe material from the Material library, which material shall I select for this pipe, as there are many options for concrete, but none of them says…
  • area change modeling

    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?
  • Re: HOW DOES HAMMER XM CALCULATE THE TRANSIENT?

    Cesar, Each pipe has it's own wave speed, which can either be entered manually in the properties or flextable, entered globally (by setting the wave speed to zero and using the global wave speed calculation option) or automatically populated, using…
  • Re: HAMMER Pipe Support

    Hi Bill, It looks like you're referring to the pipe wave speed calculator tool. The "pipeline support" field in that calculator determines the value of the Ψ coefficient in the equation for wave speed, shown in the Help documentation under the…
  • Re: Hammer - Wave Speed Reduction Factor

    At low pressures entrained air in a liquid can come out of solution, which can reduce the wave speed. This Wave Speed Reduction Factor field gives you some control over the wave speed in your model at low pressures. It is used in conjunction with the…
  • wave speed Calculation

    Hi, I am trying to do surge analysis on a water network. I finsihed setting up the model network. I was trying to put the wave speed in pipe attributes and found that the help file mentions "wave speed calculator". I couldn't find this calculator…