期刊文献+

Estimation of the turbulent viscous shear stress in a centrifugal rotary blood pump by the large eddy particle image velocimetry method 被引量:1

原文传递
导出
摘要 The non-physiologic turbulent flows in centrifugal rotary blood pumps (RBPs) may result in complications such as the hemolysis and the platelet activation. Recent researches suggest that the turbulent viscous dissipation in the smallest eddies is the main factor of the blood trauma caused by the turbulent flow. The turbulent viscous shear stress (TVSS) was taken as the realistic physical force acting on the cells. However, limited by the temporal and spatial resolutions of the instrumentation currently available, very limited studies are available for the TVSS in the RBPs. In this paper, the large eddy particle image velocimetry (PIV) method is used to estimate the turbulent dissipation rate in the sub-grid scale, to investigate the effect of the TVSS on the blood trauma. Detailed flow characteristics, such as the relative velocity vectors, the estimated TVSS levels and the Kolmogorov length scales, are analyzed in three impeller phases at three constant flow rates (3 L/min, 5 L/min and 7 L/min). Over the measures range in this study, the maximum TVSS in the investigated RBP is lower than the reported critical value of stress. This study demonstrates that the large eddy PIV method is effective to evaluate the flow-dependent force on the cells. On the other hand, it is found that the TVSS is highly dependent on the flow behavior. Under severe off-design conditions, the complex flow characteristics, such as the flow separation and the vortical structures, will increase the TVSS. Thus, in order to reduce the hemolysis in the RBPs, the flow disturbance, induced by the departure of the incidence angle, should be avoided during the design of the RBPs.
出处 《Journal of Hydrodynamics》 SCIE EI CSCD 2020年第3期486-496,共11页 水动力学研究与进展B辑(英文版)
基金 Project supported by the National Natural Science Foundation of China(Grant No.51536008) the National Key R&D Program of China(Grant No.2018 YFB0606101).
  • 相关文献

参考文献2

二级参考文献16

  • 1Luo X W. A Study on Impeller Inlet Geometry Suitable for a Mini Pump. Kitakyushu: Kyushu Institute of Technology, 2004.
  • 2Liu S H, Nishi M, Yoshida K. Impeller geometry suitable for mini turbo-pump. J Fluids Eng, 2001, 123: 500--506.
  • 3MaIchesky P S. Blood pump technology: A crowded arena J Artif Organs, 2006, 30(3): 129-129.
  • 4Akamatsu T. Development of centrifugal blood pump with magnetically suspended impeller (in Japanese). Turbomachinery, 2001, 29(1): 7-16.
  • 5Tsukiya T, Akamatsu T. Development of the centrifugal blood pump with magnetically suspended impeller (in Japanese). JSME Transaction, Part B, 1995,61(591): 3913-3920.
  • 6Kaneko M, Nakamura Y, Miyazaki K, et aI. Multi-objective optimization of blood-pump with conical spiral groove bearings. In: Proceeding of 4th International Symposium on Fluid Machinery and Fluid Engineering, Beijing, 2008.
  • 7Luo X W, Zhu L, Zhuang B T, et al. A novel shaft-less double suction mini pump. Sci China Tech Sci, 2010, 53: 105-110.
  • 8Zhuang B T, Luo X W, Zhang Y, et al. Design optimization for a shaft-less double suction mini turbo pump. In: Proceeding of 25th IAHR Symposium on Hydraulic Machinery and Systems, Timisoara, 2010.
  • 9Zhuang B T, Luo X W, Zhu L, et al. Cavitation in a shaft-less double suction centrifugal miniature pump. J Eng Thermophys, 2011, 32(SI): 57--60.
  • 10Menter F R. Two-equation eddy-viscosity turbulence models for engineering application. AIAA J, 1994,32(8): 1598-1605.

共引文献11

同被引文献7

引证文献1

二级引证文献3

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部