Dynamical effect of the dust back-reaction at the water snowline

In protoplanetary disks drag forces determine the interaction between gas and dust. Typically, dust drift inwards (following the pressure gradient), while the gas undergoes viscous evolution. However, in regions such as the water snowline, the dust back-reaction can become strong enough to stop (or reverse) the gas flow. In this work we describe the dynamical effect of the dust back-reaction, and characterize when it becomes important for the global disk evolution.