AN IMPROVED DISTINCT ELEMENT METHOD FOR HIGH PACKING FRACTION STOCHASTIC MEDIA MODELING

Due to the generality and flexibility of Monte Carlo method in geometric modeling, plays an important role accurate simulation random media. At present, rand om sequential addition (RSA) distinct element (DEM) are more mature explicit modeling methods. The former approach has problem upper limit packing fraction, which is suitable for stochastic geometry with lower filling rate. DEM can fill medium model fraction higher than 60%, but not non-contact dispersed particles based on interaction between particles. There fore, improved proposed solve p articles media high fraction. virtual surfaces constructed outside outer layer make them contact each other. Thus, particle system method. construction surface does affect neutron transport process. correctness verified by comparing total number calculation results k eff RSA same time, according distribution particles, fills uniformly.