Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Experimental and Numerical Research on the Airflow Inside Asymmetric Nasal Cavities

비대칭 비강 내 공기유동에 관한 실험 및 수치해석적 연구

  • Received : 2009.08.25
  • Accepted : 2010.06.17
  • Published : 2010.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

Knowledge of the characteristics of airflow in nasal cavities is essential to understand the physiological and pathological aspects of nasal breathing. In our laboratory, a series of experimental investigations on the nasal airflow was conducted; airflow in models of normal and deformed nasal cavities under both constant and periodic flow conditions was studied by PIV. Some of the patients with asymmetric nasal cavities experience pain or discomfort, while other patients with asymmetric nasal cavities do not experience pain. Airflows inside asymmetric nasal cavities with and without obstructions due to a bent nasal septum are investigated both experimentally by PIV and numerically by using the general-purpose FVM code in order to determine the reason for the above-mentioned discrepancy. The comparisons between two cases are tried. Heat and humidity distribution are investigated numerically.

비강의 3 가지 생리학적 주요기능은 공기조절, filtering, 후각기능이다. 비강 내 공기유동특성에 대한 지식은 비강 호흡의 생,병리학적 측면을 기반으로 한다. 본 연구실에서는 정상 및 변형된 비강 모델 내 유동에 관하여 일정유량 및 주기유동 하에서 다양한 PIV 실험들을 진행해 왔다. 비대칭 비강을 가진 환자들 중에 일부는 고통을 느끼거나 불편함을 호소하는 반면 그렇지 않은 환자들도 있다. 이 원인을 밝히기 위하여 비중격이 휘어진 비대칭 모델에 대하여 PIV 및 수치해석적인 연구를 진행하였다. 이를 위하여 이비인후과 의사로부터 모델에 관한 CT 데이터를 제공받아 PIV 및 수치해석을 통해 호기 및 흡기시의 RMS 값 및 속도 분포를 얻었다. 모델에 따라 좌우 유량이 크게 다른 것을 확인할 수 있었고 이것이 고통을 느끼는 원인중에 하나가 될 수 있다.

Keywords

References

  1. Hess, M. M., Lampercht, J. and Horlitz, S. 1992, "Experimentelle Untersuchung der Strombahnen in der Nasenhaupthoehle des Menschen am Nasen-Modell," Laryngo-Rhino-Otol. 71, pp. 468-471. https://doi.org/10.1055/s-2007-997334
  2. Scherer, P. W., Hahn, I. I. and Mozell, M.M., 1989, "The Biophysics of Nasal Airflow," Otol. Clinics N. Ame. Vol. 22, No. 2, pp. 265-278.
  3. Hopkins, L. M., Kelly, J. T., Wexler, A. S. and Prasad, A. K., 2000, "Particle Image Velocimetry Measurements in Complex Geometries," Exp. Fluids 29, pp. 91-95. https://doi.org/10.1007/s003480050430
  4. Kim, S. K. and Son, Y. R., 2002, "Particle Image Velocimetry Measurements in Nasal Airflow," Trans. of the KSME B, Vol. 26, No. 6, pp. 566-569. https://doi.org/10.3795/KSME-B.2002.26.6.811
  5. Kim, S. K. and Huh, J. R., 2004, "An Investigation on Airflow in Abnormal Nasal Cavity by PIV," Journal of Visualization, Vol. 6 No. 4, p. 274 .
  6. Kim, S. K. and Son, Y. R., 2004, "An Investigation on Airflow in Disordered Nasal Cavity and Its Corrected Models by Tomographic PIV," Measurement Science and Technology, Vol.15, pp. 1090-1096. https://doi.org/10.1088/0957-0233/15/6/007
  7. Kim, S.K., 2006, "The PIV Measurements on the Respiratory Airflow in the Human Airway," Trans. of the KSME B, Vol. 30, No. 11, p. 1051.
  8. Chung, S. K. and Kim, S. K., 2008, "Digital Particle Image Velocimetry Studies of Nasal Airflow," Respiratory Physiology & Neurobiology, Vol. 163, pp. 111-120. https://doi.org/10.1016/j.resp.2008.07.023
  9. Croce, C. et al., 2006, "In Vitro Experiments and Numerical Simulations of Airflow in Realistic nasal Airway Geometry," Annals of Biomedical Engineering, Vol. 34, No. 6, pp. 997-1007. https://doi.org/10.1007/s10439-006-9094-8
  10. Guilferme, J.M. and Garcia, et al., 2006, "Atrophic Rhinitis: a CFD Study of Air Conditioning in the Nasal Cavity," J Appl Physiol, Vol. 103, pp. 1082-1092. https://doi.org/10.1152/japplphysiol.01118.2006
  11. Doorly, D.J., Franke, V., Gambarruto, A., Taylor, D.J. and Schroter, R.C., 2006, Nasal Airflow: Computational and Experimental Modeling, 5th World Congress of Biomechanics, Munich, S270
  12. Zhao, K. et al., 2006, "Numerical Modeling of Nasal Obstruction and Endoscopic Surgical Intervention: Out Com to Air Flow and Olfaction," American J. Rhinology, Vol. 20, No. 3, pp. 308-316. https://doi.org/10.2500/ajr.2006.20.2848
  13. Wexler, D., Segal, R. and Kimbell, J., 2005, Aerodynamic Effects of Inferior Tubinate Reduction, Arch Otolaryngol Head Neck Surg, Vol. 131, pp. 1102-1107. https://doi.org/10.1001/archotol.131.12.1102
  14. Lindemann, J., Leiacker, R., Rettinger, G. and Keck, T., 2002, "Nasal Mucosal Temperature During Respiration," Clin. Otolaryngol, Vol. 27, pp. 135-139. https://doi.org/10.1046/j.1365-2273.2002.00544.x
  15. Cheng, K. H., Cheng, Y. S., Yeh, H. C. and Swift, D. L., 1997, "Measurements of Airway Dimensions and Calculation of Mass Transfer Characteristics of the Human Oral Passage," Trans. ASME, Vol. 119, 476-482. https://doi.org/10.1115/1.2833522