Geometry and airflow dynamics analysis in the nasal cavity during inhalation

Area of Science:

• Computational fluid dynamics
• Respiratory system mechanics
• Human anatomy

Background:

• Significant variations in human nasal morphology exist between and within populations.
• This anatomical diversity poses challenges for computational respiratory studies.

Purpose of the Study:

• To investigate if consistent airflow patterns exist across diverse nasal cavity geometries.
• To establish a baseline flow field for future computational respiratory research.

Main Methods:

• Simulated steady inhalation flow at 15L/min through six distinct nasal cavity models.
• Analysis of airflow behavior and pattern identification.

Main Results:

• Consistent flow patterns were observed despite geometric variations.
• High velocity was noted in the nasal valve region, with flow predominantly in the inferior nasal cavity.
• Inhaled air approached a conditioned state by mid-nasal cavity; airflow from facial front reached olfactory regions, while lateral airflow moved inferiorly.

Conclusions:

• Gross airflow features can be predicted across different nasal morphologies.
• Identified consistent flow patterns provide a foundational understanding for respiratory airflow.
• This study offers a comparative baseline for larger-scale future investigations.