  In this paper, we consider $N$ identical spherical particles sedimenting in a
uniform gravitational field. Particle rotation is included in the model while
inertia is neglected. Using the method of reflections, we extend the
investigation of [R. M. H\"ofer, Sedimentation of inertialess particles in
Stokes flows, arXiv:1610.03748, (2016)] by discussing the optimal particle
distance which is conserved in finite time. We also prove that the particles
interact with a singular interaction force given by the Oseen tensor and
justify the mean field approximation of Vlasov-Stokes equations in the spirit
of [M. Hauray and P. E. Jabin, Particle approximation of Vlasov equations with
singular forces : propagation of chaos, Ann. Sci. Ec. Norm. Super. (4), (2015)]
and [M. Hauray, Wasserstein distances for vortices approximation of Euler-type
equations, Math. Models Methods Appl. Sci. 19, (2009), pp. [1357,1384]].
