93 lines
2.5 KiB
HTML
93 lines
2.5 KiB
HTML
<HTML>
|
|
<CENTER><A HREF = "http://www.cfdem.com">CFDEMproject WWW Site</A> - <A HREF = "CFDEMcoupling_Manual.html#comm">CFDEM Commands</A>
|
|
</CENTER>
|
|
|
|
|
|
|
|
|
|
<HR>
|
|
|
|
<H3>forceModel_DiFeliceDrag command
|
|
</H3>
|
|
<P><B>Syntax:</B>
|
|
</P>
|
|
<P>Defined in couplingProperties dictionary.
|
|
</P>
|
|
<PRE>forceModels
|
|
(
|
|
DiFeliceDrag
|
|
);
|
|
DiFeliceDragProps
|
|
{
|
|
velFieldName "U";
|
|
voidfractionFieldName "voidfraction";
|
|
granVelFieldName "Us";
|
|
interpolation switch1;
|
|
voidfractionInterpolationType "type1";
|
|
UInterpolationType "type2";
|
|
suppressProbe switch2;
|
|
scale scalar1;
|
|
scaleDrag scalar2;
|
|
treatForceExplicit switch3;
|
|
implForceDEM switch4;
|
|
verbose switch5;
|
|
scalarViscosity switch6;
|
|
nu scalar3;
|
|
};
|
|
</PRE>
|
|
<UL><LI><I>U</I> = name of the finite volume fluid velocity field
|
|
|
|
<LI><I>voidfraction</I> = name of the finite volume voidfraction field
|
|
|
|
<LI><I>Us</I> = name of the finite volume granular velocity field
|
|
|
|
<LI><I>switch1</I> = (optional, normally off) flag to use interpolated voidfraction and velocity values
|
|
|
|
<LI><I>type1</I> = (optional, default cellPoint) interpolation type for voidfraction field
|
|
|
|
<LI><I>type2</I> = (optional, default cellPointFace) interpolation type for velocity field
|
|
|
|
<LI><I>switch2</I> = (optional, default false) can be used to suppress the output of the probe model
|
|
|
|
<LI><I>scalar1</I> = (optional) scaling of particle diameter
|
|
|
|
<LI><I>scalar2</I> = (optional) scaling of drag law
|
|
|
|
<LI><I>switch3</I> = sub model switch, see <A HREF = "forceSubModel.html">forceSubModel</A> for details
|
|
|
|
<LI><I>switch4</I> = sub model switch, see <A HREF = "forceSubModel.html">forceSubModel</A> for details
|
|
|
|
<LI><I>switch5</I> = sub model switch, see <A HREF = "forceSubModel.html">forceSubModel</A> for details
|
|
|
|
<LI><I>switch6</I> = sub model switch, see <A HREF = "forceSubModel.html">forceSubModel</A> for details
|
|
|
|
<LI><I>scalar3</I> = optional, only if switch6 is true
|
|
|
|
|
|
</UL>
|
|
<P><B>Examples:</B>
|
|
</P>
|
|
<PRE>forceModels
|
|
(
|
|
DiFeliceDrag
|
|
);
|
|
DiFeliceDragProps
|
|
{
|
|
velFieldName "U";
|
|
interpolation true;
|
|
}
|
|
</PRE>
|
|
<P><B>Description:</B>
|
|
</P>
|
|
<P>The force model performs the calculation of forces (e.g. fluid-particle interaction forces) acting on each DEM particle. The DiFeliceDrag model is a model that calculates the particle based drag force following the correlation of Di Felice (see Zhou et al. (2010), JFM).
|
|
</P>
|
|
<P><B>Restrictions:</B>
|
|
</P>
|
|
<P>none.
|
|
</P>
|
|
<P><B>Related commands:</B>
|
|
</P>
|
|
<P><A HREF = "forceModel.html">forceModel</A>
|
|
</P>
|
|
</HTML>
|