6.1.2 DEFINE_DPM_DRAG UDFs (Section 2.5.3)

Under the Description heading, the statement should be modified as follows:

You can use DEFINE_DPM_DRAG to specify the drag between particles and fluid as a dimensionless group ( $\frac{18C_D {\rm Re}} {24}$) as it appears in the drag force per unit particle mass:

where

$\mu$	=	viscosity.
$\rho_p$	=	particle density
$D_p$	=	particle diameter
$C_D$	=	drag coefficient
$Re$	=	Reynolds number