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Description

The fluxCorrectedVelocity is a velocity-outlet boundary condition that corrects the extrapolated velocity to match the specified flow rate.

Usage

The condition requires entries in both the boundary and field files.

Boundary file 

<patchName>
{
    type            patch;
    ...
}

Field file 

<patchName>
{
    // Mandatory entries
    type            fluxCorrectedVelocity;

    // Optional entries
    phi             <word>;
    rho             <word>;

    // Inherited entries
    ...
}

where:

Property Description Type Required Default
type Type name: fluxCorrectedVelocity word yes -
phi Name of flux field word no phi
rho Name of density field word no rho

The inherited entries are elaborated in:

Method

\[\mathbf{u}_p = \mathbf{u}_c - \mathbf{n} (\mathbf{n} \cdot \mathbf{u}_c) + \frac{\mathbf{n} \phi_p}{|\mathbf{S}_f|}\]

where:

Property Description
\(\mathbf{u}_p\) Patch velocity [m/s]
\(\mathbf{u}_c\) Velocity in cells adjacent to the patch [m/s]
\(\mathbf{u}_c\) Patch-normal vectors [-]
\(\phi_p\) Patch flux [m^3/s] or [kg/s]
\(\mathbf{S}_f\) Patch face area vectors [m^2]

Further information

Tutorial:

Source code:

API:

History:

  • Introduced in version 1.5