The calculation of settling speed of coarse particles
is firstly addressed, with accelerated Stokesian dynamics
without adjustable parameters, in which far field force acting
on the particle instead of particle velocity is chosen as
dependent variables to consider inter-particle hydrodynamic
interactions. The sedimentation of a simple cubic array of
spherical particles is simulated and compared to the results
available to verify and validate the numerical code and
computational scheme. The improvedmethod keeps the same
computational cost of the order O(N log N) as usual
accelerated Stokesian dynamics does. Then, more realistic
random suspension sedimentation is investigated with the
help ofMont Carlo method. The computational results agree
well with experimental fitting. Finally, the sedimentation of
finer cohesive particle, which is often observed in estuary
environment, is presented as a further application in coastal
engineering
