Theoretical study of nasal deposition |
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Authors: | W R Scott D B Taulbee C P Yu |
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Institution: | (1) Department of Engineering Science, Aerospace Engineering and Nuclear Engineering, State University of New York at Buffalo, 14214 Buffalo, U.S.A. |
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Abstract: | A theory is derived to calculate the regional and total deposition of aerosol particles in the nasal passages during inhalation.
The particle size studied range from 0.2 to 10.0 μm diameter. The deposition is calculated in five regions; (I) the region
filled with nasal hair, (II) the nasal valve, (III) the expansion region, (IV) the turbinate region and (V) the posterior
bend. Equations are derived to determine the deposition caused by direct impaction on the nasal hairs and bends of the passages.
The calculations show the deposition due to direct impaction does not account for the amount or location of deposited particles
measured in experiments. Secondary flows have been speculated to exist in the expansion region after the nasal valve and an
equation is derived to estimate the deposition caused by the secondary flows. The calculated deposition, due to direct impaction
and secondary flows, shows general agreement with the experiment as to the predicted amount and location of deposited particles. |
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