  An improved formulation of the Smoothed Profile method is introduced to
perform direct numerical simulations of arbitrary rigid body dispersions in a
Newtonian host solvent. Previous implementations of the method were restricted
to spherical particles, severely limiting the types of systems that could be
studied. The validity of the method is carefully examined by computing the
friction/mobility tensors for a wide variety of geometries and comparing them
to reference values obtained from accurate solutions to the Stokes-Equation.
