Nasal Air Temperature and Airflow during Respiration in Numerical Simulation Based on Multislice Computed Tomography Scan

Author:

Lindemann Joerg1,Keck Tilman1,Wiesmiller Kerstin1,Sander Bjoern2,Brambs Hans-Juergen3,Rettinger Gerhard1,Pless Daniela3

Affiliation:

1. Department of Otorhinolaryngology, University of Ulm, Prittwitzstrasse 43, Ulm, Germany

2. High Performance Computing Center Stuttgart (HLRS), University of Stuttgart, Allmandring 30, Stuttgart, Germany

3. Department of Diagnostic Radiology, University of Ulm, Steinhoevelstrasse 9, Ulm, Germany

Abstract

Background Adequate nasal air-conditioning is of greatest importance. Because detailed processes of nasal air-conditioning still are not completely understood, numerical simulations of intranasal temperature distribution and airflow patterns during inspiration and expiration were performed. Methods A three-dimensional model of the human nose based on computed tomography scans was reconstructed. A computational fluid dynamics application was used displaying temperature and airflow during respiration based on time-dependent boundary conditions. Results Absolute air temperature and velocity values vary depending on detection site and time of detection. Areas of low velocities and turbulence show distinct changes in air temperature. The turbinate areas prove to be the main regions for heat exchange. The numerical results showed excellent comparability to our in vivo measurements. Conclusion Numerical simulation of temperature and airflow based on computational fluid dynamics is feasible providing entirely novel information and an insight into air-conditioning of the human nose.

Publisher

SAGE Publications

Subject

Otorhinolaryngology

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