[vbchris]

Hi all,

I have been working on a software solution to the following problem and thought I may be headed down the wrong road. Any alternate solutions would be great insight.

I have a mesh with 1 inlet and 2 outlets.
Its a two phase problem (alpha/beta).
The solver is multiphase bubbleFoam (OF v2.0).

I have specified alpha phase fraction at the inlet as well as the velocities for both alpha and beta. I have specified the upper (relative to gravity) outlet as fixed value pressure = 0.

I would like to ensure a constant flux for alpha only at the lower outlet.

My current solution is to modify the solver to adjust the p boundary value for the lower outlet continuously to insure a alpha flux of 1/2 of the the inlets alpha flux.

Any ideas or thoughts would be greatly appreciated.
Thanks,

[niklas]

Originally Posted by vbchris

Hi all,

I have been working on a software solution to the following problem and thought I may be headed down the wrong road. Any alternate solutions would be great insight.

I have a mesh with 1 inlet and 2 outlets.
Its a two phase problem (alpha/beta).
The solver is multiphase bubbleFoam (OF v2.0).

I have specified alpha phase fraction at the inlet as well as the velocities for both alpha and beta. I have specified the upper (relative to gravity) outlet as fixed value pressure = 0.

I would like to ensure a constant flux for alpha only at the lower outlet.

My current solution is to modify the solver to adjust the p boundary value for the lower outlet continuously to insure a alpha flux of 1/2 of the the inlets alpha flux.

Any ideas or thoughts would be greatly appreciated.
Thanks,

have you tried to specify a negative massflow inlet (also this requires you to set zero gradient for pressure at that outlet)

    outlet1
    {
        type                 flowRateInletVelocity;
        value                uniform ( 0 0 0 );
        flowRate           -1;
    }