Bertrand Maury

Modeling of dense suspensions,

We present some issues related to the numerical modeling of dense suspensions of rigid bodies in a viscous fluid, for which  close range lubrication forces may play a significant role.
In the context of direct numerical simulations, thoses forces are supposed to be accounted for in the equations for the fluid. Yet, as interparticle distances may be very small compared to other characteristic lengths, most solvers are likely to fail in giving an accurate description of the interstitial flow.
For this reason, different approaches have been proposed, and  we will describe some of them in terms of numerical efficiency,  respect of the underlying physics, and influence upon the global behaviour of the  suspension.