coarse-grained CFD-DEM方法在不同流态流化床中的模拟验证

论文摘要

传统CFD-DEM方法的计算量随着系统内颗粒数目的增加而显著增加,coarse-grained CFD-DEM（粗颗粒）方法将若干个真实颗粒打包成虚拟颗粒从而显著减小系统计算量。在coarse-grained CFD-DEM方法进行应用之前,对其进行广泛的验证是有必要的。采用coarse-grained CFD-DEM方法模拟得到不同流态流化床的气固流动特征（固含率、压降、颗粒速度等）,与传统CFD-DEM和实验测量吻合较好。另外,系统的计算效率随着粗颗粒放大系数的增加显著提升。研究表明,粗颗粒方法能够以较小的计算精度损失而使计算速度大幅提升,能够适用于大尺度稠密气固流动系统的模拟。

论文目录

文章来源

类型: 期刊论文

作者: 林俊杰,罗坤,王帅,胡陈枢,樊建人

关键词: 方法,离散单元法,计算流体力学,流化床,气固两相流,计算效率

来源: 化工学报 2019年05期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 无机化工,有机化工

单位: 浙江大学能源清洁利用国家重点实验室

基金: 国家重点研发计划项目(2017YFB0601805)

分类号: TQ051.13

页码: 1702-1712

总页数: 11

文件大小: 3477K

下载量: 284

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标签：方法论文;  离散单元法论文;  计算流体力学论文;  流化床论文;  气固两相流论文;  计算效率论文;