Flow distribution and velocity profiles in realistic human airway model

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en

Comparisons of published studies done on idealized lung geometry with investigations made on more realistic models have shown an influence of complex actual geometry on flow and particle transport. To enable optical measurement of aerosol transport with air as working fluid, we created realistic thin-walled transparent airway model. The non-symmetric bifurcation model reflects real non-planar lung geometry and spans from throat to 3rd-4th generation of bronchi. Two realistic airway models were used for study of flow distribution into particular lung branches at three steady and three oscillatory flow regimes. Significant differences were found in flow rate distribution into the individual branches of each model and also between both the models. Velocity of aerosol in trachea was studied using Phase Doppler Analyzer. Mean axial velocity followed the harmonic course of generated flow. Turbulence level was found lower in the inspiration then in the expiration part of the cycle.

Flow distribution, flow velocity, realistic model, human airway

2009-06-02

Institute of Hydrodynamics ASCR

Praha

978-80-87117-06-4

Sborník XXIII. Sympozia o anemometrii

1–9

9