### 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 language | English |
---|---|

Pages (from-to) | 57-63 |

Number of pages | 7 |

Journal | Radiation Protection Dosimetry |

Volume | 38 |

Issue number | 1-3 |

Publication status | Published - 1991 |

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### ASJC Scopus subject areas

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

### Cite this

*Radiation Protection Dosimetry*,

*38*(1-3), 57-63.

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

Research output: Contribution to journal › Article

*Radiation Protection Dosimetry*, vol. 38, no. 1-3, pp. 57-63.

}

TY - JOUR

T1 - Particle deposition patterns within airway bifurcations - Solution of the 3D Navier-Stokes equation

AU - Hofmann, W.

AU - Balásházy, I.

PY - 1991

Y1 - 1991

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0026317231&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026317231&partnerID=8YFLogxK

M3 - Article

VL - 38

SP - 57

EP - 63

JO - Radiation Protection Dosimetry

JF - Radiation Protection Dosimetry

SN - 0144-8420

IS - 1-3

ER -