Publication detail
Aerosol deposition in oral/nasal cavity during breathing cycle
FORMAN, M. JÍCHA, M. KATOLICKÝ, J.
Czech title
Depozice aerosolů v ústních/nosních dutinách během dechového cyklu
English title
Aerosol deposition in oral/nasal cavity during breathing cycle
Type
conference paper
Language
en
Original abstract
A numerical model of the aerosol transport and deposition in nasal/oral cavity of a human is presented. The model was acquired from a CT scan of a living person and consist of mount-to-throat cavity and upper airways till the 6-8 generation of a bronchial tree. The deposition of the particles is given for two breathing regimes, the resting conditions with tidal volume of 0.5 litre and 15 l/min ventilation with period of 4 sec/cycle and full exercise conditions with 1.6 litre tidal volume and 120 l/min minute ventilation with cycle period of 1.25 sec/cycle. The aerosol concentration was assumed 50e-6g/m3 distributed in three size classes PM10, PM5 and PM1. The results shows deposition in different segments of the cavity as well as velocity profiles at different time steps of the breathing cycle.
Czech abstract
Výsledky z počítačového modelu depopzice prachových částic v dýchacím traktu člověka jsou prezentovány. Geometrický model pochází z CT scanu a sestává z nosních dutin, pharynxu, larynxu, glotisu a cca poloviny trachei. Depozice je vypočtena během celého dýchacíhu cyklu včetně výdechu. Cyklus má sinusový průběh a předpokládá klidový režim s minutovou ventilaci 15 L/min s periodou 4 sekundy. Druhý režim odpovídá maximální zátěži s minutovou ventilací 120 L/min a periodou 1.25. Koncentrace aerosolů je předpokládána 50e-6g/m3 ve třech různých velikostních skupinách PM10, PM5 and PM1. Výsledky ukazují výraznou depozici v nosních dutinách během fáze výdechu.
English abstract
A numerical model of the aerosol transport and deposition in nasal/oral cavity of a human is presented. The model was acquired from a CT scan of a living person and consist of mount-to-throat cavity and upper airways till the 6-8 generation of a bronchial tree. The deposition of the particles is given for two breathing regimes, the resting conditions with tidal volume of 0.5 litre and 15 l/min ventilation with period of 4 sec/cycle and full exercise conditions with 1.6 litre tidal volume and 120 l/min minute ventilation with cycle period of 1.25 sec/cycle. The aerosol concentration was assumed 50e-6g/m3 distributed in three size classes PM10, PM5 and PM1. The results shows deposition in different segments of the cavity as well as velocity profiles at different time steps of the breathing cycle.
Keywords in Czech
dýchací cesty, depozice aerosolů, CFD
Keywords in English
human airway, aerosol deposition, CFD
RIV year
2007
Released
28.11.2007
Publisher
Technická Univerzita v Liberci
Location
Liberec
ISBN
978-80-7372-273-9
Book
Conference proceedings of Experimental Fluid Mechanics 2007
Edition number
1
Pages from–to
17–22
Pages count
5
BIBTEX
@inproceedings{BUT28957,
author="Matěj {Forman} and Miroslav {Jícha} and Jaroslav {Katolický},
title="Aerosol deposition in oral/nasal cavity during breathing cycle",
booktitle="Conference proceedings of Experimental Fluid Mechanics 2007",
year="2007",
month="November",
pages="17--22",
publisher="Technická Univerzita v Liberci",
address="Liberec",
isbn="978-80-7372-273-9"
}