Large eddy and detached eddy simulations of fluid flow and particle deposition in a human mouth-throat
Large eddy and detached eddy simulations of fluid flow and particle deposition in a human mouth-throat
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DOI：
10.1016/j.jaerosci.2008.06.002
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发表时间：
2008-10-01
影响因子：
4.5
通讯作者：
Verbanck, S.
中科院分区：
文献类型：
--
作者：
Jayaraju, S. T.;Brouns, M.;Verbanck, S.
在正常呼吸条件下（301/分钟），交替使用 RANS k-omega（无近壁校正）、DES 和 LES 方法，在人体口腔模型中模拟流体流动。为了测试流体相模拟的有效性，在相同模型铸件的中心矢状面中进行 PIV 测量。速度和动能分布显示 LES/DES 实验具有良好的定量一致性，而与 RANS k-omega 实验的定量一致性较差。模拟了粒径为 2、4、6、8 和 10 μm 的颗粒的口咽沉积。通过与现有实验数据进行比较，LES/DES 在预测 5 pm 以下颗粒的沉积方面比 RANS k-omega 模型显示出相当大的改进。对于较大的颗粒，RANS k-omega 和 LES/DES 方法产生了类似的良好预测。结论是，对于以 301/min 的稳定流速吸入的药物气雾剂的模拟，LES 和 DES 比测试的 RANS k-omega 模型提供了更准确的结果。 (c) 2008 Elsevier Ltd. 保留所有权利。
Fluid flow was simulated in a human mouth-throat model under normal breathing conditions (301/min) alternatively employing RANS k-omega (without near-wall corrections), DES and LES methods. To test the validity of the fluid phase simulations, PIV measurements were carried out in a central sagittal plane of an identical model cast. Velocity and kinetic-energy profiles showed good quantitative agreement of experiments with LES/DES, and less so with RANS k-omega. Mouth-throat deposition was simulated for particle diameters 2, 4, 6, 8 and 10 mu m. By comparison with existing experimental data, LES/DES showed considerable improvement over the RANS k-omega model in predicting deposition for particle sizes below 5 pm. For the bigger particles, RANS k-omega and LES/DES methods produced similarly good predictions. It is concluded that for the simulation of medication aerosols inhaled at a steady flow rate of 301/min, LES and DES provide more accurate results than the RANS k-omega model tested. (c) 2008 Elsevier Ltd. All rights reserved.