SIMULATION METHOD USING COARSE GRAINING, SIMULATION APPARATUS, AND PROGRAM

摘要

Provided is a simulation apparatus that can perform analysis using an appropriate enlargement ratio (K), without making a user aware of the value of the enlargement ratio (K), when a coarse graining method is applied to analyze a solid-gas multiphase flow. A processing device (30) performs coarse graining for a plurality of particles (43) and analyzes a behavior of a solid-gas multiphase flow including a fluid and the plurality of particles, on the basis of simulation conditions input to an input device (38). The simulation conditions include a coarse graining ratio (C_K) indicating a ratio of an enlargement ratio (K), which defines a size relationship between a particle before the coarse graining and a particle after the coarse graining, to a reference value (K_ref), physical property values of the solid-gas multiphase flow, and physical quantities that define initial conditions and boundary conditions. The processing device (30) calculates the reference value (K_ref) of the enlargement ratio (K) on the basis of the input simulation conditions and sets a value of the enlargement ratio (K) on the basis of the reference value (K_ref) and a value of the coarse graining ratio (C_K) input to the input device (38). In addition, the processing device (30) performs the coarse graining for the plurality of particles (43) on the basis of the set enlargement ratio (K) and analyzes the solid-gas multiphase flow for a plurality of coarse-grained particles.