4.7 Article

Passive method-based clusters regulation of two-stage fluidized bed riser using dynamic cluster structure-dependent drag model

期刊

CHEMICAL ENGINEERING JOURNAL
卷 431, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.134111

关键词

Two-stage riser; Cluster regulation; Computational criterion; DCSD drag model; KTGF-based TFM; Fluidized bed

资金

  1. Natural Science Foundation of China [91752115, 51776059]

向作者/读者索取更多资源

This study investigates the passive regulation of particle clusters in two-stage fluidized bed risers using a computational model and kinetic theory of granular flow. It is found that the hydrodynamics of clusters can be controlled by adjusting the diameter ratio of the risers.
The passive method-based regulation and control of particle clusters is studied using two-fluid model (TFM) with kinetic theory of granular flow (KTGF) in two-stage fluidized bed risers which include an expanding two-stage riser and contracting two-stage riser. The occurrence of heterogeneous flow with clusters was discriminated using computational threshold in terms of the minimization of energy dissipation rate. The drag coefficient of heterogeneous flow with clusters was simulated using dynamic cluster structure-dependent (DCSD) drag model in a constant-diameter riser and diameter-transformed risers. Comparing to hydrodynamics of gas and particles in a constant-diameter riser, a transition regime exists from the first chamber to the second chamber in the diameter-transformed riser. The solid volume fraction and diameter of clusters decrease in the second chamber. The cluster velocity increased in the contracting-diameter two-stage risers, and decreased in the expanding diameter two-stage risers. The cluster existence time fractions were reduced in diameter-transformed two stage risers. Hydrodynamics of clusters are regulated by altering the diameter ratio of the diameter-transformed risers.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据