Accuracy evaluation of a numerical simulation model of nasal airflow.
CONCLUSIONS
Our numerical simulation model provides an accurate reflection of nasal airflow, and the results were validated by clinical measurements.


OBJECTIVE
To evaluate the accuracy of a numerical simulation model of nasal airflow.


METHODS
Ten volunteers with normal nasal cavities underwent CT, acoustic rhinometry, and rhinomanometry. CT data were uploaded into Mimics, ICEM-CFD, Fluent, and CFD-Post software for three-dimensional modeling, finite element grid division, transient calculations, and analysis, respectively. Velocity and pressure data of airflow were obtained during the normal respiratory cycle. The accuracy of the simulation was evaluated by two methods: acoustic rhinometry measurements were used to evaluate the accuracy of the anatomic model, and rhinomanometry measurements were used to evaluate the accuracy of the nasal resistance values obtained by numerical simulation.


RESULTS
There were no significant differences between the values describing the model and the acoustic rhinometry measurements, the nasal resistance values obtained by numerical simulation. The airflow through the nasal cavity was mainly laminar. The maximum velocities were measured at the nasal valve, the amplitudes of all velocity curves at locations beyond the nasal valve were reduced. The amplitudes of the pressure curves increased from the front to the back of the airway.
Key Laboratory of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing Institute of Otolaryngology , Beijing , China.
Jiuxing
J
Lu
Demin
D
Han
Luo
L
Zhang
D005260:Female; D020342:Finite Element Analysis; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D008954:Models, Biological; D009666:Nose / Q000000981:diagnostic imaging / Q000502:physiology*; D011859:Radiography; D012119:Respiration; D025363:Rhinomanometry; D023842:Rhinometry, Acoustic; D055815:Young Adult