Vertical mass flux through a shell with radius r. The quantity shown is the timescale t_flux, over which the mass flux replenishes the mass interior to a radius r. The black curve corresponds to run RADL27k0.01, the blue curve to run RADL0k0.01. The total flow outside r ≳ 0.3 r_H is dominated by vertical infall. The mass flow is on the order of 1% of the envelope per orbit. For the planet accreting solids, t_flux decreases towards the core because of convective motions that are not present in run RADL0k0.01. Near the core interpretation is difficult because of poor resolution on these small scales.