Knowledge Management System Of Institute of process engineering,CAS
| Simulation of heterogeneous structure in a circulating fluidized-bed riser by combining the two-fluid model with the EMMS approach | |
| Alternative Title | Ind. Eng. Chem. Res. |
| Yang, N; Wang, W; Ge, W; Wang, LN; Li, JH | |
| 2004-09-01 | |
| Source Publication | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
 |
| ISSN | 0888-5885 |
| Volume | 43Issue:18Pages:5548-5561 |
| Abstract | To consider the critical effect of mesoscale structure on the drag coefficient, this paper presents a drag model based on the energy-minimization multiscale (EMMS) approach. The proposed structure parameters are obtained from the EMMS model, and then the average drag coefficient can be calculated from the structure parameters and further incorporated into the two-fluid model to simulate the gas-solid flow in a circulating fluidized-bed riser. Simulation results indicate that the simulated flow structures are different for the EMMS-based drag model and the hybrid model using the Wen and Yu correlation and the Ergun equation. The former shows its improvement in predicting the solids entrainment rate, the mesoscale heterogeneous structure involving clusters or strands, and the radial and axial voidage distributions. The simulation results support the idea that the average drag coefficient is an important factor for the two-fluid model and suggest that the EMMS approach could be used as a kind of multiscale closure law for drag coefficient.; To consider the critical effect of mesoscale structure on the drag coefficient, this paper presents a drag model based on the energy-minimization multiscale (EMMS) approach. The proposed structure parameters are obtained from the EMMS model, and then the average drag coefficient can be calculated from the structure parameters and further incorporated into the two-fluid model to simulate the gas-solid flow in a circulating fluidized-bed riser. Simulation results indicate that the simulated flow structures are different for the EMMS-based drag model and the hybrid model using the Wen and Yu correlation and the Ergun equation. The former shows its improvement in predicting the solids entrainment rate, the mesoscale heterogeneous structure involving clusters or strands, and the radial and axial voidage distributions. The simulation results support the idea that the average drag coefficient is an important factor for the two-fluid model and suggest that the EMMS approach could be used as a kind of multiscale closure law for drag coefficient. |
| Keyword | Gas-solid Flow Discrete Particle Simulation Radial Voidage Profiles Drag Coefficient Numerical-simulation Mesoscale Structures 2-phase Flow Systems Hydrodynamics Clusters |
| Subtype | Article |
| WOS Headings | Science & Technology ; Technology |
| DOI | 10.1021/ie049773c |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | GAS-SOLID FLOW ; DISCRETE PARTICLE SIMULATION ; RADIAL VOIDAGE PROFILES ; DRAG COEFFICIENT ; NUMERICAL-SIMULATION ; MESOSCALE STRUCTURES ; 2-PHASE FLOW ; SYSTEMS ; HYDRODYNAMICS ; CLUSTERS |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Chemical |
| WOS ID | WOS:000223648400016 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Version | 出版稿 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/5016 |
| Collection | 研究所（批量导入） |
| Affiliation | Chinese Acad Sci, Inst Proc Engn, Multiphase React Lab, Beijing 100080, Peoples R China |
| Recommended Citation GB/T 7714 | Yang, N,Wang, W,Ge, W,et al. Simulation of heterogeneous structure in a circulating fluidized-bed riser by combining the two-fluid model with the EMMS approach[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2004,43(18):5548-5561. |
| APA | Yang, N,Wang, W,Ge, W,Wang, LN,&Li, JH.(2004).Simulation of heterogeneous structure in a circulating fluidized-bed riser by combining the two-fluid model with the EMMS approach.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,43(18),5548-5561. |
| MLA | Yang, N,et al."Simulation of heterogeneous structure in a circulating fluidized-bed riser by combining the two-fluid model with the EMMS approach".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 43.18(2004):5548-5561. |
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| Simulation of hetero（588KB） | 限制开放 | CC BY-NC-SA | Application Full Text | |||
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