Filtered sub-grid constitutive models for fluidized gas-particle flows constructed from 3-D simulations

被引：129

作者：

Sarkar, Avik ^{[1
,2
]}

Milioli, Fernando E. ^{[3
]}

Ozarkar, Shailesh ^{[4
]}

Li, Tingwen ^{[5
,6
]}

Sun, Xin ^{[1
]}

Sundaresan, Sankaran ^{[3
]}

机构：

[1] Pacific Northwest Natl Lab, Fundamental & Computat Sci Directorate, POB 999,MSIN K7-90, Richland, WA 99352 USA

[2] Pfizer Inc, Worldwide Res & Dev, MS 8156-014,Eastern Point Rd, Groton, CT 06340 USA

[3] Princeton Univ, Chem & Biol Engn, A-315 Engn Quadrangle, Princeton, NJ 08544 USA

[4] ANSYS Inc, Canonsburg, PA 15317 USA

[5] Natl Energy Technol Lab, 3610 Collins Ferry Rd, Morgantown, WV 26507 USA

[6] AECOM, 3610 Collins Ferry Rd, Morgantown, WV 26507 USA

来源：

CHEMICAL ENGINEERING SCIENCE | 2016年 / 152卷

关键词：

Computational fluid dynamics (CFD); Constitutive models; Fluidization; Multiphase flow; Scale-up; Two-fluid model; TRAVELING-WAVE SOLUTIONS; 2-FLUID MODELS; DRAG MODELS; VALIDATION; DIFFUSION; EQUATIONS;

D O I：

10.1016/j.ces.2016.06.023

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The accuracy of fluidized-bed CFD predictions using the two-fluid model can be improved significantly, even when using coarse grids, by replacing the microscopic kinetic-theory-based closures with coarse grained constitutive models. These coarse-grained constitutive relationships, called filtered models, account for the unresolved gas-particle structures (clusters and bubbles) via sub-grid corrections. Following the previous 2-D approaches of Igci et al. [AIChE J., 54(6), 1431-1448, 2008] and Milioli et al. [AIChE J., 59(9), 3265-3275, 2013], new closures for the filtered inter-phase drag and stresses in the gas and particle phases are constructed from highly-resolved 3-D simulations of gas-particle flows. These new closure relations are then validated through the bubbling-fluidized-bed challenge problem presented by National Energy Technology Laboratory and Particulate Solids Research Inc. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：443 / 456

页数：14