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Particle deposition due to turbulent diffusion in the upper respiratory systemAerosol deposition in the upper respiratory system (trachea to segmental bronchi) is considered and the importance of turbulent diffusion as a deposition mechanism is evaluated. It is demonstrated that for large particles (diameter greater than about 5 microns), turbulent diffusion is the dominant deposition mechanism in the trachea. Conditions under which turbulent diffusion may be important in successive generations of the pulmonary system are determined. The probability of particle deposition is compared with probabilities of deposition, as determined by the equations generally used in regional deposition models. The analysis is theoretical; no new experimental data is presented.
Document ID
19790064238
Document Type
Reprint (Version printed in journal)
Authors
Hamill, P. (NASA Ames Research Center Moffett Field, Calif.; NASA, Langley Research Center, Hampton, Va.; Universidad Catolica, Caracas, Venezuela)
Date Acquired
August 9, 2013
Publication Date
March 1, 1979
Publication Information
Publication: Health Physics
Volume: 36
Subject Category
MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
Distribution Limits
Public
Copyright
Other