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Numerical modeling of inhaled charged aerosol deposition in human airways

Koolpiruck, D., Prakoonwit, S. and Balachandran, W. (2004) Numerical modeling of inhaled charged aerosol deposition in human airways. IEEE Transactions on Industry Applications, 40 (5). pp. 1239-1248. ISSN 0093-9994

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To link to this item DOI: 10.1109/TIA.2004.834032

Abstract/Summary

A new numerical modeling of inhaled charge aerosol has been developed based on a modified Weibel's model. Both the velocity profiles (slug and parabolic flows) and the particle distributions (uniform and parabolic distributions) have been considered. Inhaled particles are modeled as a dilute dispersed phase flow in which the particle motion is controlled by fluid force and external forces acting on particles. This numerical study extends the previous numerical studies by considering both space- and image-charge forces. Because of the complex computation of interacting forces due to space-charge effect, the particle-mesh (PM) method is selected to calculate these forces. In the PM technique, the charges of all particles are assigned to the space-charge field mesh, for calculating charge density. The Poisson's equation of the electrostatic potential is then solved, and the electrostatic force acting on individual particle is interpolated. It is assumed that there is no effect of humidity on charged particles. The results show that many significant factors also affect the deposition, such as the volume of particle cloud, the velocity profile and the particle distribution. This study allows a better understanding of electrostatic mechanism of aerosol transport and deposition in human airways.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science
ID Code:19125
Uncontrolled Keywords:Poisson equation, charge density, dilute dispersed phase flow, electrostatic force, fluid force control, human airways, inhaled charged aerosol deposition, modified Weibel model, particle distributions, particle-mesh methods, velocity profiles
Publisher:IEEE

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