Computational Study on the Performance of a Centrifugal Lvad With the Impeller Designed by Industrial Method: Proposing Simple-to-Manufacture Lvad’s Impellers

Abstract

Although the demand of donor hearts for patients with end-stage heart failure is growing, its supply has remained constant. Ventricular assist devices (VADs) provide a chance of finding donor heart by increasing waiting period. In this study, the main goal is to employ an industrial method (point-by-point method) for designing blades profile with a simplified geometry which can be produced by conventional manufacturing methods. In this study, a centrifugal continuous-flow rotary pump is designed and the effects of components’ different geometries on the left ventricular assist devices (LVADs) function are investigated. Moreover, both hydraulic performance and blood damages (hemolysis index (HI)) caused by the pump are considered as design criteria. ANSYS CFX 17 is used to analyze the performance of the designed LVAD. Additionally, the geometry of components are investigated based on fulfilling the required performance of the LVAD while reducing the blood damage level. Comparing the designed VAD with the commercial ones shows that the designed blade further improves the performance of the centrifugal LVAD. Therefore, designing the impeller’s blade profile with point-by-point method seems to be promising. Simplicity in manufacturing is considered to be a big advantage for a design which also leads to lower manufacturing costs. This study demonstrates how industrial design methods can be employed to design simple-to-manufacture impellers which are suitable for LVADs.

Optimization of a centrifugal blood pump designed using an industrial method through experimental and numerical study

“…In the present study, pressure and volume flow rate boundary conditions were used for the inlet and outlet, respectively. The volume flow rate in the outlet was chosen equal to 5 l/min [67][68][69][70] The total head of centrifugal pumps are almost constant 35 ; accordingly they are not so much sensitive to inlet pressure, though the Pressure www.nature.com/scientificreports/ in the inlet was chosen to be 40 mmHg which is left Intraventricular average pressure. For many problems, it may be possible to refer the entire computational domain to a single moving reference frame.…”