Simulation of Particle Trajectories in Bifurcating Tubes

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Abstract

A numerical method for computing aerosol particle trajectories in bifurcating tubes has been elaborated. The model consists of three characteristic parts; (i) construction of the geometry of the bifurcation, (ii) calculation of the fluid flow field, and (iii) computation of the particle trajectories. The geometry was designed on a three-dimensional computer mesh. The flow field was formulated by solving the steady-state Navier-Stokes and Poisson equations with a finite difference approximation. The particle trajectories were generated having assumed the simultaneous action of inertial impaction, gravitational sedimentation, Brownian motion, and interception mechanisms. With a knowledge of particle trajectories one can examine the spatial distribution of deposition or the penetration efficiencies of particles in bifurcations. In this paper only the models is detailed; its usage in examining aerosol particle deposition in airway bifurcations is presented elsewhere for both inhalation and exhalation.

Original languageEnglish
Pages (from-to)11-22
Number of pages12
JournalJournal of Computational Physics
Volume110
Issue number1
DOIs
Publication statusPublished - Jan 1994

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ASJC Scopus subject areas

  • Numerical Analysis
  • Modelling and Simulation
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)
  • Computer Science Applications
  • Computational Mathematics
  • Applied Mathematics

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