Rychlostní profily v idealizovaném modelu horních cest dýchacích

Velocity profiles in idealized model of human respiratory tract

conference paper

en

This article deals with numerical simulation focused on velocity profiles in idealized model of human upper airways during steady inspiration. Three regimes of breathing were investigated: Resting condition, Deep breathing and Light activity which correspond to most common regimes used for experiments and simulations. Calculation was validated with experimental data given by Phase Doppler Anemometry performed on the model with same geometry. This comparison was made in multiple points which form one cross-section in trachea near first bifurcation of bronchial tree. Development of velocity profile in trachea during steady inspiration was discussed with respect for common phenomenon formed in trachea and for future research of transport of aerosol particles in human respiratory tract.

Článek se zabývá numerickými výpočty zaměřenými na rychlostní profily ve zjednodušeném modelu horních cest dýchacích, během nádechu. Řešeny byli tři druhy lidské aktivity: Klidový režím, Hluboký nádech a lehká aktivita, které odpovídají nejběžněji řešeným případům. Výsledky výpočtu byly porovnány s experimenty provedenými na modelu se stejnou geometrií. Srovnání bylo provedeno v 33 bodech v trachei poblíž první bifurkace bronchiálního stromu. Vývoj proudění v trachei během nádechu a jevy, které ovlivňují proudění v této oblasti byly diskutovány.

This article deals with numerical simulation focused on velocity profiles in idealized model of human upper airways during steady inspiration. Three regimes of breathing were investigated: Resting condition, Deep breathing and Light activity which correspond to most common regimes used for experiments and simulations. Calculation was validated with experimental data given by Phase Doppler Anemometry performed on the model with same geometry. This comparison was made in multiple points which form one cross-section in trachea near first bifurcation of bronchial tree. Development of velocity profile in trachea during steady inspiration was discussed with respect for common phenomenon formed in trachea and for future research of transport of aerosol particles in human respiratory tract.

CFD, proudění, horní cesty dýchací

CFD, airflow, human upper airways

2012

20.11.2012

EDP Sciences

Liberec

978-80-7372-912-7

2100-014X

Proceedings of the International conference Experimental Fluid Mechanics 2012

45

1

1

165–168

4