Searching for a mesh-independent sub-grid model for CFD simulation of gas-solid riser flows
文献类型：期刊论文
| 作者 | Lu, Bona1,2; Wang, Wei1; Li, Jinghai1 |
| 刊名 | CHEMICAL ENGINEERING SCIENCE
 |
| 出版日期 | 2009-08-01 |
| 卷号 | 64期号:15页码:3437-3447 |
| 关键词 | Sub-grid Structure Multiscale Momentum transfer Multiphase flow Simulation Fluidization |
| ISSN号 | 0009-2509 |
| 通讯作者 | Wang, W |
| 英文摘要 | This work aims to examine the effects of grid size in applying the two-fluid model (TFM), and thereby attempts to search for a mesh-independent sub-grid model for simulating gas-solid riser flows. To this end, we performed a series of TFM simulations over a periodic domain with various grid resolutions and drag closures. Of these drag models, EMMS/matrix model in its simplified version was chosen to be the focus of discussion. It was found that TFM simulation with a homogeneous drag model reaches its numerically asymptotic solution when the grid scale is as small as 10 times the particle diameter, but it still fails to capture the characteristic S-shaped axial voidage profile and highly over-predicts the solids flux. By comparison, EMMS/matrix model seems to reach a mesh-independent solution of the effect of sub-grid structures on the drag force, and predict successfully the axial voidage profile and the solids flux with even coarse grid. Therefore, the fine-grid TFM simulation is inadequate for gas-solid riser flows. We need sub-grid modeling of the heterogeneous structure. (C) 2009 Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | CIRCULATING FLUIDIZED-BED ; DISCRETIZED BOLTZMANN-EQUATION ; PARTICULATE SUSPENSIONS ; NUMERICAL SIMULATIONS ; HYDRODYNAMICS ; SPHERES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000271298500005 |
| 公开日期 | 2013-12-05 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/6612]  |
| 专题 | 过程工程研究所_多相复杂系统国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Bona,Wang, Wei,Li, Jinghai. Searching for a mesh-independent sub-grid model for CFD simulation of gas-solid riser flows[J]. CHEMICAL ENGINEERING SCIENCE,2009,64(15):3437-3447. |
| APA | Lu, Bona,Wang, Wei,&Li, Jinghai.(2009).Searching for a mesh-independent sub-grid model for CFD simulation of gas-solid riser flows.CHEMICAL ENGINEERING SCIENCE,64(15),3437-3447. |
| MLA | Lu, Bona,et al."Searching for a mesh-independent sub-grid model for CFD simulation of gas-solid riser flows".CHEMICAL ENGINEERING SCIENCE 64.15(2009):3437-3447. |
入库方式： OAI收割
来源：过程工程研究所
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