Numerical investigation of airflow in an idealized human extra-thoracic airway: a comparison study |
| |
Authors: | Jie Chen Ephraim Gutmark |
| |
Affiliation: | 1. School of Aerospace Systems, University of Cincinnati, Cincinnati, OH, 45221, USA
|
| |
Abstract: | 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 $ktext{- }omega $ and $ktext{- }omega $ -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. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|