格子ボルツマン法の多粒子分散系への適用(流体工学,流体機械)

概要

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We have discussed the feasibility of the lattice Boltzmann method as a simulation technique with multi-body hydrodynamic interactions for many particle dispersions, by considering aggregation phenomena in a two-dimensional suspension composed of magnetic particles. The results obtained here are summarized as follows. The density ratio between magnetic particles and the ambient liquid does not significantly influence the cluster formation. If relatively coarse lattices are used, physically reasonable aggregate structures can be obtained, but if fine lattices are adopted, the particle Brownian motion cannot be activated properly, which causes invalid aggregate formation of particles. We may conclude that, if relatively coarse lattice systems are used, the translational and rotational Brownian motion of particles is reasonably activated, but if fine lattice system are adopted, the lattice Boltzmann method cannot give rise to physically reasonable results.
社団法人日本機械学会の論文
2009-10-25