کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4453113 | 1312133 | 2008 | 14 صفحه PDF | دانلود رایگان |
Fluid flow was simulated in a human mouth–throat model under normal breathing conditions (30 l/min) alternatively employing RANS k–ωk–ω (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–ωk–ω. Mouth–throat deposition was simulated for particle diameters 2, 4, 6, 8 and 10μm. By comparison with existing experimental data, LES/DES showed considerable improvement over the RANS k–ωk–ω model in predicting deposition for particle sizes below 5μm. For the bigger particles, RANS k–ωk–ω 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 30 l/min, LES and DES provide more accurate results than the RANS k–ωk–ω model tested.
Journal: Journal of Aerosol Science - Volume 39, Issue 10, October 2008, Pages 862–875