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Aspherix Solver

Aspherix Calibration

forceSubModel: scaleDragByReFunction

Syntax

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

forceModels
(
    XYZDrag
);
XYZDragProps
{
    forceSubModels
    (
        scaleDragByReFunction
    );

    functionOfRe table
    (
        (0      2)
        (1000   1)
    );
};

Examples

forceModels
(
    KochHillDrag
);
KochHillDragProps
{
    forceSubModels
    (
        scaleDragByReFunction
    );

    functionOfRe table
    (
        (0      2)
        (1000   1)
    );
}

Description

This forceSubModel performs a drag correction in the form of $C_{d,c} = C_{d} \alpha$ , where $C_{d}$ is the original drag coefficient as defined by the drag model, $C_{d,c}$ is the corrected one, and $\alpha = \alpha(Re)$ is a function of the particle’s Reynolds number.

The function $\alpha(Re)$ is defined in form of look-up table (see keyword functionOfRe). The first value of each pair is $Re$ and the second $\alpha(Re)$ . A linear interpolation is used to calculate $\alpha$ for other values of $Re$ .

Restrictions

None.