Capability assessment of coarse-grid simulation of gas-particle riser flow using sub-grid drag closures
Capability assessment of coarse-grid simulation of gas-particle riser flow using sub-grid drag closures
复制标题
使用子网格阻力闭合的粗网格模拟气体颗粒上升流的能力评估
DOI:
10.1016/j.ces.2019.115410
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发表时间:
2020-02
影响因子:
4.7
通讯作者:
Zheng-Hong Luo
中科院分区:
文献类型:
--
作者:
Li-Tao Zhu;Ya-Nan Yang;De-Tao Pan;Zheng-Hong Luo
Our prior work developed an effective material-property-dependent sub-grid model (SGM) for efficient coarse-grid riser flow simulations. To apply this SGM for the purpose of designing and scaling-up riser reactors reliably, quantitative assessment in its predictive capability is required. Here, we quantify the influence of various model parameters with respect to time-averaging, grid resolution, time step, discretization scheme for convection terms, and solid-wall slip condition by implementing extensive three-dimensional coarse-grid simulations. Moreover, we compare several crucial SGM-based coarse-grid and coarse-grained methods to reveal their advantages and disadvantages. Detailed parametric sensitivity analyses demonstrate that the accurate determination of SGM appears to play a dominant role in successfully predicting hydrodynamics. The optimal selection of the other model parameters is suggested to realize a compromise between computation speed and accuracy. Overall, this fundamental study helps to quantitatively understand the predictability of SGMs for coarse-grid simulations of large-scale riser reactors.
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影响因子:
5.2
作者:
Schalk Cloete;S. T. Johansen;S. Amini
通讯作者:
Schalk Cloete;S. T. Johansen;S. Amini
影响因子:
--
作者:
A. Vila;S. Sanjeevi;Jt Johan Padding;S. Pirker
通讯作者:
A. Vila;S. Sanjeevi;Jt Johan Padding;S. Pirker
影响因子:
4.7
作者:
Li-Tao Zhu;Yuan-Xing Liu;Jia-XunTang;Zheng-Hong Luo
通讯作者:
Zheng-Hong Luo
影响因子:
4.7
作者:
Xizhong Chen;Junwu Wang
通讯作者:
Xizhong Chen;Junwu Wang
影响因子:
4.7
作者:
Li-Tao Zhu;Yuan-Xing Liu;Zheng-Hong Luo
通讯作者:
Zheng-Hong Luo