In the recent years, high spatial resolution observations of protoplanetary disks (PPDs) by ALMA
have revealed many details that are providing interesting constraints on the disk physics as well as
dust dynamics, both of which are essential for understanding planet formation. We carry out high-
resolution, 2D global hydrodynamic simulations, including the effects of dust feedback. We find that
Kelvin-Helmholtz like instability can occur in PPDs which lead to both the quasi-axisymmetric rings
and non-asymmetric dust traps. In particular, we find out the quasi-axisymmetric dust rings could
provide several observational signatures that can be tested. These effects are providing additional
understanding of dust dynamics in PPDs. We also produce synthetic dust emission images using our
simulation results and discuss the comparison between simulations and observations.
