CFD modelling of a liquid-solid fluidized bed
CFD modelling of a liquid-solid fluidized bed
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DOI：
10.1016/j.ces.2007.07.014
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发表时间：
2007-11-01
影响因子：
4.7
通讯作者：
Grace, John R.
中科院分区：
文献类型：
--
作者：
Cornelissen, Jack T.;Taghipour, Fariborz;Grace, John R.
采用多流体欧拉计算流体动力学（CFD）模型对液固流化床进行了数值模拟。数值模拟进行了定性评估的实验数据从文献和定量与新的实验数据进行比较。网格尺寸，时间步长和收敛准则的影响进行了研究。改变恢复系数并没有显著改变结果。Gidaspow阻力关系预测的空隙率比文和俞阻力法。两种不同的液体分布器（均匀和不均匀）进行了模拟和比较，但更好地表示的几何形状的分布器板并没有很大的影响结果。定性，模拟显示的趋势相似的实验趋势报告的不同作者。预测还比较了新的实验结果为1.13毫米玻璃球在各种各样的表观液体速度（0.0085- 0.110米/秒）和两个不同的温度（12和33摄氏度）显着影响液体粘度。计算流体力学模型的预测值在稳态实验数据的5%以内，并且显示出粘度变化的正确趋势。(c)2007爱思唯尔有限公司保留所有权利。
A multifluid Eulerian computational fluid dynamics (CFD) model with granular flow extension is used to simulate a liquid-solid fluidized bed. The numerical simulations are evaluated qualitatively by experimental data from the literature and quantitatively by comparison with new experimental data. The effects of mesh size, time step and convergence criteria are investigated. Varying the coefficient of restitution did not alter the results significantly. The Gidaspow drag relationship predicted a higher voidage than the Wen and Yu drag law. Two different liquid distributors (uniform and non-uniform) were simulated and compared, but a better representation of the geometry of the distributor plate did not greatly influence the results. Qualitatively, the simulations show trends similar to experimental trends reported by various authors. The predictions are also compared with new experimental results for 1.13mm glass spheres at a wide variety of superficial liquid velocities (0.0085-0.1 10m/s) and two different temperatures (12 and 33 degrees C) significantly affecting the liquid viscosity. The CFD model predictions are within 5% of the steady-state experimental data and show the correct trend with variation in viscosity. (c) 2007 Elsevier Ltd. All rights reserved.