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<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_gradPForce command
</H3>
<P><B>Syntax:</B>
</P>
<P>Defined in couplingProperties dictionary.
</P>
<PRE>forceModels
(
gradPForce;
);
gradPForceProps
{
pFieldName "pressure";
densityFieldName "density";
velocityFieldName "U";
interpolation;
};
</PRE>
<UL><LI><I>pressure</I> = name of the finite volume fluid pressure field
<LI><I>density</I> = name of the finite volume gravity field
<LI><I>U</I> = name of the finite volume fluid velocity field
<LI><I>interpolation</I> = flag to use interolate interpolated pressure values (normally off)
</UL>
<P><B>Examples:</B>
</P>
<PRE>forceModels
(
gradPForce;
);
gradPForceProps
{
pFieldName "p";
densityFieldName "rho";
velocityFieldName "U";
interpolation;
}
</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 gradPForce model is a model that calculates the particle based pressure gradient force -(grad(p)) * Vparticle (see Zhou et al. (2010): "Discrete particle simulation of particle-fluid flow: model formulations and their applicability" ,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>