  An overset grid method was used to investigate the interaction between a
particle-laden flow and a circular cylinder. The overset grid method was
implemented in the Pencil Code , a high-order finite-difference code for
compressible flow simulation. High-order summation-by-part operators were used
at the cylinder boundary, and both bi-linear Lagrangian and bi-quadratic spline
interpolation was used to communicate between the background grid and the
body-conformal cylindrical grid. The performance of the overset grid method was
assessed to benchmark cases of steady and unsteady flows past a cylinder. For
steady flow at low Reynolds number, high-order accuracy was achieved for
velocity components. Results for flow in the vortex shedding regime showed good
agreement to the literature. The method was also applied to particle-laden flow
simulations, where spherical point particles were inserted upstream of the
cylinder. These inertial particles were convected towards and (possibly) past
the cylinder. The simulations reproduced data from the literature at a
significantly reduced cost, revealing that the previously published DNS data is
less accurate than assumed for particles with very small Stokes numbers.
