Numerical Simulation of the Effect of Rotary Pump Geometry on Blood Flow in Patients under Hemodynamic Support after Fontan Procedure

The effect of changes in the geometry of an implantable rotary blood pump on blood flow was studied. Eight three-dimensional models of pumps with varying outlet angles of the straightener blades and varying lengths of the impeller blades were used in the study. For all cases, the H–Q curves were cal...

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Bibliographic Details
Published in:Biomedical engineering 2021-03, Vol.54 (6), p.411-415
Main Authors: Denisov, M. V., Telyshev, D. V.
Format: Article
Language:English
Subjects:
Analysis
Angles (geometry)
Axial flow pumps
Biomaterials
Biomedical and Life Sciences
Biomedicine
Blades
Blood flow
Blood pumps
Computational fluid dynamics
Curves
Engineering
Fluid flow
Heart surgery
Hemodynamics
Mathematical models
Numerical analysis
Numerical models
Rotor speed
Shear stress
Stresses
Three dimensional flow
Three dimensional models
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Summary:The effect of changes in the geometry of an implantable rotary blood pump on blood flow was studied. Eight three-dimensional models of pumps with varying outlet angles of the straightener blades and varying lengths of the impeller blades were used in the study. For all cases, the H–Q curves were calculated and analyzed, and the effect of the pump geometry on the scalar shear stresses at the operating point 2.2 L/min was assessed. The study showed that miniaturization of the axial pump by reducing the length of the rotor should be accompanied by an increase in the rotor speed to maintain the required level of support. In this case, the volume of the regions with increased scalar shear stresses does not change significantly. Numerical modeling of fluid flow was run in Fluent ANSYS 19.0 computational fluid dynamics software.
ISSN:0006-3398
1573-8256
DOI:10.1007/s10527-021-10051-9