forceSubModel: superficialVelocity

Syntax

Defined in couplingProperties sub-dictionary of the force model in use.

forceModels
(
    XYZDrag
);
XYZDragProps
{
    forceSubModels
    (
        superficialVelocity
    );
};

Examples

forceModels
(
    KochHillDrag
);
KochHillDragProps
{
    forceSubModels
    (
        superficialVelocity
    );
}

Description

Switches the simulation to use superficial instead of interstitial velocity. When solving momentum and continuity equations, the voidfraction is considered to be 1. Consequently, channelling and similar effects are neglected and calculated pressure losses, e.g. over particle beds, may not be accurate. Attaching this forceSubModel to a forceModel scales that model’s contribution by the inverse voidfraction (before re-setting this field for solution of the Navier-Stokes equation) and such alters the forceModel to use the superficial instead of the interstitial velocity.

Note

This setting affects the simulation globally.

Restrictions

This forceSubModel is only compatible with the following solvers:

Moreover, this forceSubModel is only compatible with the following forceModels: