Voidage correction method for DEM study of 3D pebble flows in a bed of cycloidal base  

作　　者：Zirui Xia Minglei Shi Quan Zou Nan Gui Xingtuan Yang Jiyuan Tu Shengyao Jiang 

机构地区：[1]Institute of Nuclear and New Energy Technology,Collaborative Innovation Center of Advanced Nuclear Energy Technology,Key Laboratory of Advanced Reactor Engineering and Safety,Ministry of Education,Tsinghua University,Beijing,100084,China [2]Department of Engineering Physics,Tsinghua University,Beijing,100084,China [3]Department of Automation,Tsinghua University,Beijing,100084,China [4]School of Engineering,RMIT University,Melbourne,VIC,3083,Australia

出　　处：《Particuology》2024年第10期30-40,共11页颗粒学报（英文版）

基　　金：support by the National Science and Technology Major Project(grant No.2011zx06901-003);the fund of the Nuclear Power Technology Innovation Centre(grant No.HDLCXZX-2021-ZH-024).

摘　　要：Voidage(porosity or void fraction)in packed particles(or pebbles)is of fundamental importance in calculating the pressure drop,obtaining the drag,predicting the bed permeability,estimating the neutron streaming,etc.For the case when particles are deformed,a method of voidage correction during the packing state is proposed using a Discrete Element Method(DEM)simulation of 3D pebble flow inside a bed of cycloidal base.A function to evaluate the remaining volume of a pebble intercepted by horizontal and vertical planes is proposed for voidage calculation.After that,the process of solving voidage distribution is provided in detail.Using this method,the voidage inside the cycloidal-base pebble bed is obtained to refer to reported similar data for validation.This method can be potentially used for dynamical voidage calculation in CFD-DEM simulation which can get suitable voidage distribution after the correction.

关 键 词：VOIDAGE Pebbleflow Packed bed Discreteelementmethod Cycloidal base KD-TREE Volume correction 

分 类 号：TQ02[化学工程]