Numerická simulace proudění v realistickém modelu horních cest dýchacích

Numerical simulation of air flow in a realistic model of the human upper airways

článek ve sborníku ve WoS nebo Scopus

en

This article deals with the numerical simulation of air flow in a realistic model of the human upper airways and a comparison of calculated velocity profiles with experimental results. The realistic model of the upper respiratory tract used for the comparison includes the larynx, trachea and bronchial tree to the fourth generation of branching. The numerical simulation employs URANS approach for cyclic flow regime which represents inspiration and expiration of air by sinusoidal function for the air flow rate of 15 l/min. The experimental measurement is performed using Phase-Doppler Particle Anemometry (P/DPA) on the same geometry as the simulation. The velocity data are compared at several points in the trachea, and in the first and second generation of the bronchial tree. Specific air flow characteristics are documented and discussed based on results of the numerical simulation of the velocity field.

Tento článek se zabývá numerickou simulací proudění v realistickém modelu horních cest dýchacích a ověřením vypočtených hodnot pomocí dat z experimentu. Model použitý pro srovnání obsahuje hrtan, tracheu a bronchiální strom do čtvrté generace větvení. Simulace využívá model URANS k simulování cyklického režimu dýchání o objemovém toku 15 l/min. Experimenty byly provedeny pomocí fázové dopplerovské anemometrie (P/DPA) na totožné geometrii jako simulace. Hodnoty rychlostí byly srovnávány v několika bodech v trachey a v první a druhé generaci bronchiálního stromu.

This article deals with the numerical simulation of air flow in a realistic model of the human upper airways and a comparison of calculated velocity profiles with experimental results. The realistic model of the upper respiratory tract used for the comparison includes the larynx, trachea and bronchial tree to the fourth generation of branching. The numerical simulation employs URANS approach for cyclic flow regime which represents inspiration and expiration of air by sinusoidal function for the air flow rate of 15 l/min. The experimental measurement is performed using Phase-Doppler Particle Anemometry (P/DPA) on the same geometry as the simulation. The velocity data are compared at several points in the trachea, and in the first and second generation of the bronchial tree. Specific air flow characteristics are documented and discussed based on results of the numerical simulation of the velocity field.

CFD, Plíce, Proudová pole

CFD, Lung, Air flow

2010

24.11.2010

Technical university of Liberec

Liberec

978-80-7372-670-6

International conference Experimental Fluid Mechanics 2010 Conference Proceedings Volume 1

115–119

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