Effective viscosity of random suspensions without uniform separation

This work is devoted to the definition and analysis of effective viscosity associated with a random suspension small rigid particles in steady Stokes fluid. While previous works on topic have been conveniently assuming that are uniformly separated, we show how some ideas due Jikov can be adapted relax this unphysical assumption, particular allowing for contacts dimension $d>3$ almost $d=3$, provided geometric non-degeneracy condition satisfied.