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Feed stream (multiphaseEulerFoam)

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Old   March 26, 2014, 10:06
Default Feed stream (multiphaseEulerFoam)
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I need to know how and where the feed stream is calculated/formed? In tutorial-case "bubbleColumn" of multiphaseEulerFoam are besides other files are files for the velocity of the phases and the alphas of the phases.

Within a velocity file can be found:

        type               fixedValue;
        value              uniform (0 0.1 0);
Within a alpha file can be found:

        type            fixedValue;
        value           uniform 0.5;
Within the boundary file in bubbleColumn/constant/polyMesh can be found:

        type            patch;
        nFaces          25;
        startFace       3650;
Three questions:
1.I guess the feed streams of each phase are somehow calculated by this data, right?
2.How are the feed streams of each phase calculated?
3.Where and in which object/variable are these feed streams for each phase are stored?

greetings maybee
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Old   April 4, 2014, 06:53
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Dominik Schmidt
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If you use:

type                          flowRateInletVelocity;  
volumetricFlowRate    constant 0.1;  //m3/s
value                         uniform (0 0 0);
your feed rate [m3/s] is calculated as:
alpha_phase_inlet x volumetricFlowRate value

Otherwise it's calculated with the face area of the inlet, the inlet velocity and the alpha value of the phase.
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