Learning Forum

[javat33489]

Colleagues. Could you write what you would do in my place with this task? I've exhausted all ideas.

 

So let me remind you what happened.

 

1. I made a calculation using water for a centrifugal pump. I used pressure at the inlet and flow at the outlet. I selected the inlet pressure so that there was no vacuum in the pump housing. Everything is fine.

 

2. Next I need to add 5% methane. I use a mixture, the base phase is water, the second is methane.

It is no longer possible to use the output flow rate, because you need to set the methane flow rate at the output and volume fraction at the input, which introduces dissonance into the problem statement.

 

Then I have two options: 1. Flow at the inlet and pressure (found when calculating on water) at the outlet. 2. Inlet velocity (found when calculating on water) and outlet pressure (found when calculating on water).

But when I use any of these options, my continuity increases and the calculation ends with an error. And when I use inlet flow and outlet pressure, the methane phase does not reach the outlet at all.

As I wrote earlier, I used many settings to avoid this (read above), but nothing helps.

 

I've exhausted all my ideas and would like to listen to yours. Thank you.