Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

Comparison of Shear-Thinning Blood Flow Characteristics between Longitudinal and Transverse Vibration

  • Choi, Sung-Ho (School of Mechanical Engineering, Kyungpook National University) ;
  • Shin, Se-Hyun (School of Mechanical Engineering, Kyungpook National University) ;
  • Lee, Kyung-Tae (Department of Aerospace Engineering, Sejong University)
  • Published : 2004.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

This article described the numerical investigation of shear-thinning blood flow characteristics when subjected to longitudinal and transverse vibrations and delineated the underlying mechanisms of the flow rate enhancements, respectively. In order to fully consider the mechanical vibrations of the capillary, a moving wall boundary condition was adopted. The present numerical results showed that the longitudinal vibration caused a significant increase of wall shear rates, which resulted in a decrease of viscosity and the subsequent increase of flow rates. However, the shear rate for the transverse vibration was slightly increased and the calculated flow rate was underestimated comparing with the previous experimental results.

Keywords

References

  1. CFDRC., 2003, 'CFD-ACE Manual,' Huntsville., USA
  2. Deshpande, N. S. and Barig, M., 2001, 'Vibrational flow of Non-Newtonian fluids,' Chem. Eng. Sci., Vol. 56, pp. 3845-3853 https://doi.org/10.1016/S0009-2509(01)00059-8
  3. Deysarkar, A. K. and Turner, G. A., 1981, 'Flow of Paste in a Vibrated Tube,' J. Rheology, Vol. 25, pp. 41-54 https://doi.org/10.1122/1.549636
  4. Goshawk, J. A. and Walters, K., 1994, 'The Effect of Oscillation on the Drainage of an Elastic-Viscous Liquid,' J. Non-Newtonian Fluid Mech., Vol. 54, pp44p
  5. Phan-Thien, N. and Dudek, J., 1982, 'Pulsating Flow Revisited,' J. Non-Newtonian Fluid Mech., Vol. 11 pp. 147-161 https://doi.org/10.1016/0377-0257(82)85019-2
  6. Suh, S., Yoo, S., Kim, D. I. and Lee, B., 1998, 'Effect of Physical Vibration in Blood Viscosity,' J. Korean Vascular Surgery Society., Vol. 14, No. 1, pp. 29-32
  7. Shin, S., Ku, Y. H., Moon, S. Y. and Suh, J. S., 2003a, 'Vibration on the Hemorheological Characteristics of Non-Aggregated Blood,' KSME Int. J., Vol. 17, pp. 1104-1110
  8. Shin, S. and Lee, J. H., 2003b, 'Characteristics of Shear-Thinning Fluid Viscosity Under Traversal Vibration in a Circular Capillary Flow,' Jap. J. Applied Physics., Vol. 78, pp. 256-272