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Radiation Protection Dosimetry Advance Access originally published online on November 28, 2006
Radiation Protection Dosimetry 2006 122(1-4):537-539; doi:10.1093/rpd/ncl399
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

CFD as a tool in risk assessment of inhaled radon progenies

Árpád Farkas1,2,*, Werner Hofmann2, Imre Balásházy1 and István Szoke1

1 KFKI Atomic Energy Research Institute, 1525 Budapest, P.O. Box 49, Hungary
2 University of Salzburg, Hellbrunner Strasse 34, 5020 Salzburg, Austria

* Corresponding author: farkasa{at}sunserv.kfki.hu


  Abstract

During the last decade, computational fluid dynamics techniques proved to be a powerful tool in the modelling of biological processes and the design of biomedical devices. In this work, a computational fluid dynamics method was applied to model the transport of inhaled air and radioactive particles within the human respiratory tract. A finite volume numerical approach was used to compute the flow field characteristics and particle trajectories in the lumen of the first five airway generations of the human tracheobronchial tree, leading to the right upper lobe. The computations were performed for breathing and exposure conditions characteristic of uranium mines and homes. Primary radon daughter deposition patterns and energy distributions were computed, exhibiting highly inhomogeneous particle and energy deposition patterns. The results of the present modelling effort can serve as input data in lung cancer risk analysis.


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