Sketch of the pebble mass flux as function of semi-major axis in the N-body code. The pebble mass flux decreases with decreasing semi-major axis because of pebble accretion. Interior to the snowline, the pebble mass flux is halved due to evaporation. When streaming instability (SI) is active, the pebble mass flux at the snowline is decreased even further due to planetesimal formation, as dictated by the Lagrangian dust code.