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Fig. 2

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Particle scale height Hp for small particles (size τf ≤ 0.002, R ≤ 1.5 mm) over the course of the simulation. The top figure shows the entire simulation, including the sedimentation phase. After 250 orbits, Hp has reached a steady state and the numerical experiment begins. The bottom figure shows only the gas removal phase. Gas is removed exponentially. In the bottom plot, the simulation time is replaced by the solid concentration Z = Σsolid/ Σtotal. For particles in this size scale, the scale height is determined primarily by Δ, and secondly by Z.

This figure is made of several images, please see below:

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