School of Aerospace Systems, University of Cincinnati, Cincinnati, OH, 45221, USA,
Biomech Model Mechanobiol. 2014 Jan;13(1):205-14. doi: 10.1007/s10237-013-0496-x. Epub 2013 Apr 26.
Large eddy simulation (LES) technique is employed to numerically investigate the airflow through an idealized human extra-thoracic airway under different breathing conditions, 10, 30, and 120 l/min. The computational results are compared with single and cross hot-wire measurements, and with time-averaged flow field computed by standard [Formula: see text] and [Formula: see text]-SST Reynolds-averaged Navier-Stokes (RANS) models and the Lattice Boltzmann method (LBM). The LES results are also compared to root-mean-square (RMS) flow field computed by the Reynolds stress model (RSM) and LBM. LES generally gives better prediction of the time-averaged flow field than RANS models and LBM. LES also provides better estimation of the RMS flow field than both the RSM and the LBM.
采用大涡模拟（LES）技术，数值研究了在不同呼吸条件下，10、30 和 120 l/min 时通过理想化人体胸外气道的气流。将计算结果与单丝和交叉热线测量以及标准[公式：见文本]和[公式：见文本]-SST 雷诺平均 Navier-Stokes (RANS) 模型和格子 Boltzmann 方法 (LBM) 计算的时均流场进行了比较。LES 结果还与通过雷诺应力模型 (RSM) 和 LBM 计算的均方根 (RMS) 流场进行了比较。LES 通常比 RANS 模型和 LBM 对流场的时均预测更好。LES 还对流场的 RMS 估计比 RSM 和 LBM 都要好。
