[abhishek_patil_06]

In my model I have two inlet. The fluid from second inlet is driven by the pressure drop created using the flow of fluid from first inlet. I want to check the pressure and mass flow at outlet.
I'm trying to simulate this case using velocity inlet and outflow but I'm not getting correct results.
Can anyone suggest me correct boundary conditions? Specifically at second inlet because I know only pressure at this inlet.

Sent from my Lenovo K50a40 using CFD Online Forum mobile app

[divergence]

So basically you want to study how big is the mass flow from the second inlet? Like you wrote, the suction created by the first outlet will define the second mass flow, so if your first mass flow is already settled, you could try to change the geometry of the second inlet. You might have incorrect dimensions for the second inlet if the mass flow is not correct.

[abhishek_patil_06]

I know first inlet mass flow, second inlet pressure and at outlet I don't have any value or parameter. I want to find out flow parameters at outlet and mass flow at second inlet.
Both inlets have circular cross section. Not any complex shape..

Sent from my Lenovo K50a40 using CFD Online Forum mobile app

[divergence]

If it's raw numbers you're looking for, why can't you just use report command to get the values?

report/fluxes/mass-flow inlet1 inlet2 outlet ()

I don't use outflow definition in my own calculations so I cannot say exactly how it behaves but I assume that you can get the desired flow parameters for instance like this:

report/surface-integrals/vertex-avg outlet () velocity-magnitude ()

I suppose that the outflow bc does not force the pressure level to 0 Pa static pressure (or whatever it would be defined with pressure outlet), which would mean that you would get decent values for pressure from the pressure outlet.

[abhishek_patil_06]

Will mass flow from second inlet change, if I'm giving specific boundary condition?

Sent from my Lenovo K50a40 using CFD Online Forum mobile app

[divergence]

If you define for instance that the mass flow of the second inlet is 1 kg/s, then this value is what you get from Fluent. It is probably a nice idea just toy around with the different boundary conditions in order to get a conception of the playground.

If you already know what the mass flows of the first and the second inlet are, I would suggest that you would define them exactly with mass flow inlet boundary condition.

[abhishek_patil_06]

No I don't know exact value at second inlet. I want to find out from CFD.

Sent from my Lenovo K50a40 using CFD Online Forum mobile app