Do particles falling through a bounded cylinder of water fall in a specific pattern? Do micro particles (~10 micron diameter) falling under gravity through a liquid (Newtonian) in a cylinder settle in a specific density pattern upon reaching the bottom of the cylinder?
This could be due to interactions with one another and/or the cylinder wall, but I am a biologist not a physicist engineer, so my literature search has been somewhat fruitless. I thought that perhaps they would either accumulate at the edge of the cylinder, accumulate towards the centre of the cylinder or fall randomly. I have attached a schematic depicting the former two options of density patterns as viewed from the side (top row) and viewed from above (bottom row).
Cheers, Lucas.

 A: There are two limiting cases to consider: if the colloidal suspension of particles is dilute or dense.


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*Dilute: assuming each particle is influenced negligibly by its neighbor particles, particles will not displace axially and simply fall downwards from where they were originally as a result of Stokes reversibility.

*Dense: this scenario is quite complex, as the movement of the particles will generate macroscale flows that will then generate more movement, in addition to now relevant particle-particle interactions. In this scenario, I would expect particles to settle largely in the center due to the expected backflow on the cylinder boundary as a result of the original particle movement, but particle-particle interactions may change that in unpredictable ways.  


For a general and accessible perspective of microscale fluid mechanics that describes this and other related phenomena, I highly recommend Brian Kirby's "Micro- and Nanoscale Fluid Mechanics" or Ronald Probstein's "Physicochemical Hydrodynamics". 
