mirror of
https://github.com/ParticulateFlow/CFDEMcoupling-PFM.git
synced 2025-12-08 06:37:44 +00:00
60 lines
1.7 KiB
HTML
60 lines
1.7 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>voidfractionModel_dividedVoidFraction command
|
|
</H3>
|
|
<P><B>Syntax:</B>
|
|
</P>
|
|
<P>Defined in couplingProperties dictionary.
|
|
</P>
|
|
<PRE>voidfractionModel divided;
|
|
dividedProps
|
|
{
|
|
alphaMin number1;
|
|
scaleUpVol number2;
|
|
interpolation;
|
|
weight number3;
|
|
}
|
|
</PRE>
|
|
<UL><LI><I>number1</I> = mininmum limit for voidfraction
|
|
|
|
<LI><I>number2</I> = diameter of the particle's representation is artificially increased according to <I>number2</I> * Vparticle, volume remains unaltered!
|
|
|
|
<LI><I>interpolation</I> = flag to interpolate voidfraction to particle positions (normally off)
|
|
|
|
<LI><I>number3</I> = scaling of the particle volume to account for porosity or agglomerations.
|
|
|
|
|
|
</UL>
|
|
<P><B>Examples:</B>
|
|
</P>
|
|
<PRE>voidfractionModel divided;
|
|
dividedProps
|
|
{
|
|
alphaMin 0.2;
|
|
scaleUpVol 1.0;
|
|
weight 1.;
|
|
}
|
|
</PRE>
|
|
<P><B>Description:</B>
|
|
</P>
|
|
<P>The divided voidFraction model is supposed to be used when a particle (or it's representation) is in the size range of a CFD cell. Satellite points are used to divide the particle's volume to the touched cells.
|
|
</P>
|
|
<P>The region of influence of a particle can be increased artificially by "scaleUpVol", which blows up the particles, but keeps their volume (for voidfraction calculation) constant.
|
|
</P>
|
|
<P>The particle volume occupied in the CFD domain can be adjusted by the parameter "weight", using Vparticle=dsphere^3*pi/6*weight.
|
|
</P>
|
|
<P><B>Restrictions:</B> none.
|
|
</P>
|
|
<P><B>Related commands:</B>
|
|
</P>
|
|
<P><A HREF = "voidfractionModel.html">voidfractionModel</A>
|
|
</P>
|
|
</HTML>
|