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EVALUATION OF LAGRANGIAN AND EULERIAN APPROACHES FOR PREDICTION OF HEMOLYSIS IN BLOOD PUMPS
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 Title & Authors
EVALUATION OF LAGRANGIAN AND EULERIAN APPROACHES FOR PREDICTION OF HEMOLYSIS IN BLOOD PUMPS
Hong, S.; Son, C.; Kang, S.; Hur, N.; Kim, W.; Kang, S.H.;
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 Abstract
A blood pump is an important part of a cardiac assist device. Since the shear rate in blood is known to be a primary factor on hemolysis generation, it has been very important to evaluate hemolysis inside blood pumps for understanding performance and reliability of cardiac assist devices. In this study, hemolysis generation inside blood pumps is analyzed using CFD with power-law based models for the blood damage index(BDI), in order to overcome difficulties in measuring hemolysis by experiment. The BDI values in blood pumps can be evaluated using Lagrangian or Eulerian approaches. In this study, several Lagrangian and Eulerian approaches are compared to estimate the efficiency of the numerical methods in a practice sense. It is found that the Eulerian approaches are advantageous in terms of the efficiency and robustness. Two different Eulerian approaches are used to evaluate the BDI values of a few commercial blood pumps. For the conditions of extracorporeal membrane oxygenator(ECMO) and ventricular assist device(VAD), local generation of hemolysis is analyzed using divided regions of blood pumps, in order to investigate the effects of the pump geometry.
 Keywords
Blood Pump;CFD;Hemolysis;Blood Damage Index;
 Language
Korean
 Cited by
 References
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