抄録
A new parallel computational technique has been proposed for the mixing and segregation of granular mixture with multi-block grid system. In this technique, a three-dimensional computational volume is decomposed into multiple blocks which are represented by 3D body-fitted coordinates. The computations of the particle motions in the multiple blocks are executed simultaneously on the basis of the distinct element method (DEM). The possible particle contacts through the boundary shared by two blocks are detected by exchanging the particle positions included in the near-boundary volumes. Since the numerical visualization procedure is also treated as one of the parallel processes, it scarcely affects the efficiency of particle computations. The computational method was applied to the granular binary mixture in a horizontal rotating cylinder. As a result, it was shown that the segregation of the mixture is successfully predicted by the present technique.
