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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.5

ISSN Imprimir: 1065-3090
ISSN On-line: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.2011003784
pages 225-239

SEGMENTED MODELS AND PARTICLE IMAGE VELOCIMETRY (PIV) APPLIED TO FLOW ANALYSIS IN THE NASAL CAVITY

Franz Peters
Fluid Mechanics, Ruhr-Universitat Bochum, IB 6/44, 44780 Bochum, Germany
Marius Knotel
Fluid Mechanics, Ruhr-Universitat Bochum, IB 6/44, 44780 Bochum, Germany

RESUMO

The nasal cavity is an example of a complex three-dimensional flow channel with limited accessibility for internal measurements. Clinical CT and MRT data together with CAD tools offer ways to create solid models of the cavity. Yet, due to limited transparency and the need of refractive index matching when using liquid as working fluid it remains difficult to collect velocity data from the cavity. In order to overcome this difficulty, we present an approach that uses segmented models. Different from other reported velocity measurements in models of the nasal cavity they allow operation on a 1:1 scale with air. PIV is applied straightforwardly at the cutting planes yielding velocity distribution and flow rate. Results are provided for two models representing the geometry of two individual nasal cavities at peak flow of 1 liter/s together with a flow rate/pressure characterization. It is concluded that the use of segmented models is an encouraging means for applying PIV to flow in complex 3D passages like nasal airways.

Referências

  1. Brugel-Ribere, L., Fodil, R., Coste, A., Lager, C., Isabey, D., Harf, A., and Louis, B. , Segmental analysis of nasal cavity compliance by acoustic rhinometry.

  2. Hahn, I., Scherer, P. W., and Mozell, M. M. , Velocity profiles measured for airflow through a large-scale model of the human nasal cavity.

  3. Hopkins, L. M., Kelly, J. T., Wexler, A. S., and Prasad, A. K. , Particle image velocimetry measurements in complex geometries.

  4. Inthavong, K., Wen, J., Tu, J.,and Tian, Z. , From CT scans to CFD modeling — fluid and heat transfer in a realistic human nasal cavity.

  5. Kim, S. K. and Chung, S. K. , Investigation on the respiratory airflow in human airway by PIV.

  6. Masing, H. , Experimentelle Untersuchungen tiber die Storming im Nasenmodell.

  7. Raffel, M., Willert, C., and Kompenhans, J. , Particle Image Velocimetry: A Practical Guide.

  8. Schreck, S., Sullivan, K. J., Ho, C. M., and Chang, H. K. , Correlations between flow resistance and geometry in a model of the human nose.

  9. Spence, C. J. T., Buchmann, N. A., Jermy, M. C., and Moore, S. M. , Stereoscopic PIV measurements of flow in the nasal cavity with high flow therapy.

  10. Wolf, M., Naftali, S., Schroter, R. C., and Elad, D. , Air-conditioning characteristics of the human nose.


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