Unsteady RANS and detached eddy simulation of themultiphase flow in a co-current spray drying

doi:10.1016/j.cjche.2015.05.007

›› 2015, Vol. 23 ›› Issue (9): 1421-1428.DOI: 10.1016/j.cjche.2015.05.007

• 流体力学与传递现象 • 下一篇

Unsteady RANS and detached eddy simulation of themultiphase flow in a co-current spray drying

Jolius Gimbun^1,2, Noor Intan Shafinas Muhammad³, Woon Phui Law²

1 Centre of Excellence for Advanced Research in Fluid Flow, Universiti Malaysia Pahang, Pahang 26300, Malaysia;
2 Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, Pahang 26300, Malaysia;
3 Faculty of Technology, Universiti Malaysia Pahang, Pahang 26300, Malaysia

收稿日期:2014-05-17 修回日期:2015-04-03 出版日期:2015-09-28 发布日期:2015-10-24
通讯作者: Jolius Gimbun
基金资助:
Supported by the Ministry of Education Malaysia through RACE (RDU121308) and FRGS (RDU130136).

Unsteady RANS and detached eddy simulation of themultiphase flow in a co-current spray drying

Jolius Gimbun^1,2, Noor Intan Shafinas Muhammad³, Woon Phui Law²

1 Centre of Excellence for Advanced Research in Fluid Flow, Universiti Malaysia Pahang, Pahang 26300, Malaysia;
2 Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, Pahang 26300, Malaysia;
3 Faculty of Technology, Universiti Malaysia Pahang, Pahang 26300, Malaysia

Received:2014-05-17 Revised:2015-04-03 Online:2015-09-28 Published:2015-10-24
Supported by:
Supported by the Ministry of Education Malaysia through RACE (RDU121308) and FRGS (RDU130136).

摘要/Abstract

摘要： A detached eddy simulation (DES) and a k-ε-based Reynolds-averaged Navier-Stokes (RANS) calculation on the co-current spray drying chamber is presented. The DES used here is based on the Spalart-Allmaras (SA) turbulence model, whereas the standard k-ε (SKE) was considered here for comparison purposes. Predictions of the mean axial velocity, temperature and humidity profile have been evaluated and compared with experimental measurements. The effects of the turbulence model on the predictions of the mean axial velocity, temperature and the humidity profile are most noticeable in the (highly anisotropic) spraying region. The findings suggest that DES provide amore accurate prediction (with error less than 5%) of the flow field in a spray drying chamber comparedwith RANS-based k-ε models. The DES simulation also confirmed the presence of anisotropic turbulent flow in the spray dryer from the analysis of the velocity component fluctuations and turbulent structure as illustrated by the Q-criterion.

关键词: Drying, Turbulence, Two-phase flow, CFD, Detached eddy simulation, Modelling strategy

Abstract: A detached eddy simulation (DES) and a k-ε-based Reynolds-averaged Navier-Stokes (RANS) calculation on the co-current spray drying chamber is presented. The DES used here is based on the Spalart-Allmaras (SA) turbulence model, whereas the standard k-ε (SKE) was considered here for comparison purposes. Predictions of the mean axial velocity, temperature and humidity profile have been evaluated and compared with experimental measurements. The effects of the turbulence model on the predictions of the mean axial velocity, temperature and the humidity profile are most noticeable in the (highly anisotropic) spraying region. The findings suggest that DES provide amore accurate prediction (with error less than 5%) of the flow field in a spray drying chamber comparedwith RANS-based k-ε models. The DES simulation also confirmed the presence of anisotropic turbulent flow in the spray dryer from the analysis of the velocity component fluctuations and turbulent structure as illustrated by the Q-criterion.

Key words: Drying, Turbulence, Two-phase flow, CFD, Detached eddy simulation, Modelling strategy

Jolius Gimbun, Noor Intan Shafinas Muhammad, Woon Phui Law. Unsteady RANS and detached eddy simulation of themultiphase flow in a co-current spray drying[J]. , 2015, 23(9): 1421-1428.

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Unsteady RANS and detached eddy simulation of themultiphase flow in a co-current spray drying

Unsteady RANS and detached eddy simulation of themultiphase flow in a co-current spray drying

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