TITLE:
Characteristic size research of human nasal cavity and the respiratory airflow CFD analysis
AUTHORS:
Jun Zhang
KEYWORDS:
Nasal Cavity; Characteristic Dimension; Three-Dimensional Reconstruction; Numerical Simulation of Flow Field; Computational Fluid Dynamic; Finite Element Method
JOURNAL NAME:
Journal of Biosciences and Medicines,
Vol.1 No.2,
December
10,
2013
ABSTRACT: To study the airflow distribution in human nasal cavity during respiration and the characteristic parameters for nasal structure,
thirty three-dimensional, anatomically accurate representations of adult nasal cavity
models were reconstructed based on processed tomography images collected from
normal people. The airflow fields in nasal cavities were simulated using the
fluid dynamics with the finite element software ANSYS. The results showed
that the difference of human nasal cavity structure led to varying airflow distribution
in the nasal cavities and the main airflow passed through the common nasal
meatus. The nasal resistance in the regions of nasal valve and nasal vestibule
accounted for more than a half of overall resistance. The characteristic
model of nasal cavity was extracted based on the characteristic points and dimensions
deducted from the original models. It showed that either the geometric
structure or the air-flow field of the two kinds of model was similar. The
characteristic dimensions were the characteristic parameters of nasal cavity that
properly represented the original model in research for nasal cavity.