Numerical investigation of volute tongue design on hemodynamic characteristics and hemolysis of the centrifugal blood pump

Abstract In the design of rotary blood pumps, optimization parameters plays an essential role in enhancing hydrodynamic performance and hemocompatibility. This study investigates influence volute tongue angle as a geometric parameter on hemodynamic characteristics pump. A numerical investigation five different versions designs is carried out by utilizing computational fluid dynamics (CFD) software ANSYS-FLUENT. The effect evaluated regarding performance, circumferential pressure distribution, radial force, damage potential. series configurations are constructed with fixed gap (5%), but varying angles ranging from 10 to 50°. relative hemolysis assessed Eulerian based empirical power-law model. pressure-flow rate at range rotational speeds obtained experimental measurements using analog fluid. results indicate inverse relationship between hydraulic angle; higher angles, decrease was observed. However, improves net force acting impeller. pump achieves optimized 20° relatively high minor risk.