Verification of sub-grid filtered drag models for gas-particle fluidized beds with immersed cylinder arrays
Verification of sub-grid filtered drag models for gas-particle fluidized beds with immersed cylinder arrays
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DOI：
10.1016/j.ces.2014.04.018
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发表时间：
2014-07
影响因子：
4.7
通讯作者：
A. Sarkar;Xin Sun;S. Sundaresan
中科院分区：
文献类型：
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作者：
A. Sarkar;Xin Sun;S. Sundaresan
通过包含过滤本构模型，可以提高流化床粗网格多相 CFD 模拟的准确性。在我们之前的研究中（Sarkar et al., 2013 Chem. Eng. Sci., 104, pp. 399–412），我们为具有浸入式冷却管阵列的床开发了这样一组过滤阻力关系。这项工作解决了这些过滤阻力模型的验证问题。将粗网格模拟和子网格过滤校正的预测与全尺寸湍流和鼓泡流化床的精确、高分辨率模拟进行比较。过滤阻力模型为获得宏观预测提供了一种计算高效且准确的替代方案，但牺牲了中尺度聚类异质性的空间分辨率。
The accuracy of coarse-grid multiphase CFD simulations of fluidized beds may be improved via the inclusion of filtered constitutive models. In our previous study (Sarkar et al., 2013 Chem. Eng. Sci., 104, pp. 399–412), we developed such a set of filtered drag relationships for beds with immersed arrays of cooling tubes. Verification of these filtered drag models is addressed in this work. Predictions from coarse-grid simulations with the sub-grid filtered corrections are compared against accurate, highly-resolved simulations of full-scale turbulent and bubbling fluidized beds. The filtered drag models offer a computationally efficient yet accurate alternative for obtaining macroscopic predictions, but the spatial resolution of meso-scale clustering heterogeneities is sacrificed.