Une approche lagrangienne pour la simulation d'interactions particule/particule en écoulement

Lagrangian approach for the simulation of particle interactions in two phase flows

Laboratoire d'Energétique des Systèmes et Procédés, de l'URA-CNRS de Rouen

Abstract

Hydrodynamic interactions between particle pairs are studied following sedimentation theory. For two spheres, interactions are directly obtained through the resistance matrix which links interaction forces to particle relative velocities. For more than two spheres, the mobility matrix is estimated with a four order approximation on the particle distance, and then it is inversed to get the resistance matrix. A set of motion equations (coupled by the resistance matrix) is then solved to describe the particle behaviours. Results for sedimenting particles and collisions in low turbulence field are presented.