| Unsteady RANS and detached eddy simulation of the multiphase flow in a co-current spray drying☆ |
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| 作者姓名： | Jolius Gimbun Noor Intan Shafinas Muhammad Woon Phui Law |
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| 作者单位： | 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 |
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| 基金项目： | Supported by the Ministry of Education Malaysia through RACE (RDU121308) and FRGS (RDU130136). |
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| 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–Al maras (SA) turbu-lence 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 a more accurate prediction (with error less than 5%) of the flow field in a spray drying chamber compared with RANS-based k-εmodels. 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 il us-trated by the Q-criterion.
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| 关 键 词： | Drying Turbulence Two-phase flow CFD Detached eddy simulation Modelling strategy |
| 收稿时间： | 2014-05-17 |
Unsteady RANS and detached eddy simulation of themultiphase flow in a co-current spray drying |
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| 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].Chinese Journal of Chemical Engineering,2015,23(9):1421-1428. |
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| Authors: | Jolius Gimbun Noor Intan Shafinas Muhammad Woon Phui Law |
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| Affiliation: | 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 |
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| 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–Al maras (SA) turbu-lence 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 a more accurate prediction (with error less than 5%) of the flow field in a spray drying chamber compared with RANS-based k-εmodels. 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 il us-trated by the Q-criterion. |
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| Keywords: | Drying Turbulence Two-phase flow CFD Detached eddy simulation Model ing strategy |
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