CFD simulation of transient gas to particle heat transfer for fluidized and spouted regimes

被引：37
作者：
Fattahi, Mohsen [1 ]
Hosseini, Seyyed Hossein [2 ]
Ahmadi, Goodarz [3 ]
机构：
[1] Univ Kurdistan, Dept Chem Engn, Fac Engn, Sanandaj 66177, Iran
[2] Ilam Univ, Dept Chem Engn, Ilam 69315516, Iran
[3] Clarkson Univ, Dept Mech & Aeronaut Engn, Potsdam, NY 13699 USA
来源：
APPLIED THERMAL ENGINEERING | 2016年 / 105卷
关键词：
CFD; Spouted bed; Transient heat transfer; Temperature distribution; Fluidized regime; EULER-LAGRANGE APPROACH; GRANULAR FLOW; KINETIC-THEORY; SOLID FLOW; DISCRETE ELEMENT; DEM SIMULATION; BED REACTOR; DYNAMICS; TUBE; HYDRODYNAMICS;
D O I：
10.1016/j.applthermaleng.2015.05.071
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The transient gas to particle heat transfer for fluidized and spouted regimes was studied using a Eulerian Eulerian two-fluid model (TFM) in conjunction with the kinetic theory of granular flows (KTGF). The inlet gas temperature was transient which increased with time. Effect of modelling parameter of specularity coefficient on the simulation results was studied. It was found that specularity coefficient is a critical parameter which affects on the particles behaviour and the value of 0.025 leads to creation of incoherent spouting similar to the measurements. The temporal variation of particles concentration and temperature distribution in the spouted and fluidized regimes were compared with the corresponding experimental data for three distinct regions of spout, fountain and annulus. It was shown that the CFD model predicted the particles distribution properly for both regimes. In addition, the CFD predictions for particle temperature distribution for the spouted regime were in a better agreement with the measurements, when compared with that for the fluidized regime. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：385 / 396
页数：12
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