Fluids

Fluids

Centrifugal pump cavitation

    • Jacob.bia3
      Subscriber

      Good evening 

      I'm doing a centrifugal pump cavitation on cfx server but i'm struggling to determine the boundary conditions for the cavitation case( i want to plot cavitation number with head).I have tried to run it with these boundary conditions: 

      Case 1: 

      Inlet: mass flow 5 kg/s.

      Outlet: static pressure 300000 pa.

      Case 2:

      Inlet: mass flow 5.

      Outlet: static pressure 1 atm.

      The head in case 2 is bigger than case 1 which is not reasonable because cavitation number decreases. 

       

       

       

       

    • Jacob.bia3
      Subscriber

    • sam
      Subscriber

      Good morning, Jacob,

      Can you share your mesh setup if possible? 

      For the boundary, the inlet should be your massflow and the outlet pressure gauge should be 0 psi. If you have pressure at the outlet, then cavitation is expected to happen

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