  We present a numerical study of settling and clustering of small inertial
particles in homogeneous and isotropic turbulence. Particles are denser than
the fluid, but not in the limit of being much heavier than the displaced fluid.
At fixed Reynolds and Stokes numbers we vary the fluid-to-particle mass ratio
and the gravitational acceleration. The effect of varying one or the other is
similar but not quite the same. We report non-monotonic behavior of the
particles' velocity skewness and kurtosis with the second parameter, and an
associated anomalous behavior of the settling velocity when compared to the
free-fall Stokes velocity, including loitering cases. Clustering increases for
increasing gravitational acceleration, and for decreasing fluid-to-particle
mass ratio.
