Boundary Conditions for Fluent

- December 15, 2019 at 2:06 am
  
  thamarai
  Subscriber
  
  Hi All,
  
  I am working in a project on a Fire Hydrant Valve and finding difficulty with the boundary conditions. Here is case.
  
  I want to calculate the mass flow rate in a valve. For the first case I assumed inlet pressure as 5.5 bar and pressure to be 4.5 bar after simulation I got -11Kg/s as mass flow rate. If I increase the pressure above 5.5 bar Im getting mass flow rate as positive . But Practically which is not possible. Why Iam getting this.?
  
  I used Steady state, Energy equation, With K epsilon Model, RNG. Kindly need your suggestion to over come this. Thank You.
- December 16, 2019 at 11:20 am
  
  Rob
  Ansys Employee
  
  Which pressure are you changing? What pressure is 4.5 bar? In future please keep similar questions in one thread to avoid duplication & confusion. I'll lock https://forum.ansys.com/forums/topic/boundary-conditions-for-a-valve/ for this reason.

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