Particle deposition patterns within airway bifurcations - Solution of the 3D Navier-Stokes equation

W. Hofmann, I. Balásházy

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Analytical solutions of the equations of particle motion in a human airway bifurcation require the assumptions of an idealised geometry and idealised flow conditions. Here, we calculate the actual velocity profile of air during inspiration in a more realistic airway bifurcation geometry on a three-dimensional computer mesh by solving the steady-state Navier-Stokes equation with finite difference techniques. Knowledge of the velocity field of air within the branching site allows us to simulate the trajectories of aerosol particles entrained in the airstream using Monte Carlo methods, considering the simultaneous effects of gravitational settling, inertial impaction, Brownian motion and interception. The spatial deposition pattern within bifurcations is then determined by the intersection of particle trajectories with the surrounding wall surfaces.

Original languageEnglish
Pages (from-to)57-63
Number of pages7
JournalRadiation Protection Dosimetry
Volume38
Issue number1-3
Publication statusPublished - 1991

Fingerprint

Bifurcation (mathematics)
Navier-Stokes equation
Navier Stokes equations
velocity distribution
Air
Trajectories
interception
Monte Carlo Method
inspiration
Geometry
particle trajectories
Brownian movement
air
settling
particle motion
geometry
Aerosols
intersections
Particles (particulate matter)
Monte Carlo method

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Radiation
  • Radiological and Ultrasound Technology

Cite this

Particle deposition patterns within airway bifurcations - Solution of the 3D Navier-Stokes equation. / Hofmann, W.; Balásházy, I.

In: Radiation Protection Dosimetry, Vol. 38, No. 1-3, 1991, p. 57-63.

Research output: Contribution to journalArticle

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