CFD-Based Flow Channel Optimization and Performance Prediction for a Conical Axial Maglev Blood Pump

Yang, Wei-Bo; Peng, Si-Jie; Xiao, Wei-Hu; Hu, Yefa; Wu, Huachun; Li, Ming

doi:10.3390/s22041642

Cited by 4 publications

(6 citation statements)

References 17 publications

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“…The import and export differential pressure of a conical axial blood pump was higher than that of the traditional axial blood pump, and with the increase of impeller hub taper, the export pressure of the blood pump was increasing, and the conical design could effectively improve the hydraulic performance of blood pump. 3 The number of impeller blades would directly affect the flow and pressure of the blood pump pumping blood and would also impact the hemolytic value of the blood pump. 3,4,6 And the two variables of hub taper and the number of vanes were mainly determined by experience during the initial design.…”

Section: Model and Methodsmentioning

confidence: 99%

“…3 The number of impeller blades would directly affect the flow and pressure of the blood pump pumping blood and would also impact the hemolytic value of the blood pump. 3,4,6 And the two variables of hub taper and the number of vanes were mainly determined by experience during the initial design.…”

Section: Model and Methodsmentioning

confidence: 99%

“…After CFD analysis and calculation, the particle data of the above models were derived and substituted into the hemolysis model equation (3). The calculated hemolytic estimated value is shown in Figure 11.…”

Section: Hemolytic Performance Analysismentioning

confidence: 99%

“…Experimental and numerical methods were used to analyze the performance of 15 different impellers to study the effect of each parameter on the pump performance and hemolysis, and suggestions were given for selecting the best parameters when efficiency and hemolysis performance were optimal. Yang et al 3 used CFD numerical calculations for a magnetically levitated supported axial-flow blood pump to study the effects of the rotor hub and guide vane hub integration, rotor hub front and rear tip geometry, and the conical shape of the corner on the internal pressure distribution and hemolytic performance of the blood pump. The results concluded that using conical impeller hub integration can reduce the blood pump's speed, volume, and power consumption, thus facilitating implantation.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of rotor impeller structure on performance improvement of suspended axial flow blood pumps

Wang,

Yun,

Tang

et al. 2024

Int J Artif Organs

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Background: The hydrodynamic suspension structure design of the axial blood pump impeller can avoid the problems associated with using mechanical bearings. However, the particular impeller structure will impact the hydraulic performance and hemolysis of the blood pump. Method: This article combines computational fluid dynamics (CFD) with the Lagrange particle tracking method, aiming to improve the blood pump’s hydraulic and hemolysis performance. It analyzes the flow characteristics and hemolysis performance inside the pump. It optimizes the taper of the impeller hub, the number of blades, and the inclination angle of the circumferential groove at the top of the blade. Results: Under certain rotational speed conditions, an increase in the taper of the impeller hub or the number of blades can increase the pumping pressure of a blood pump, but an increase in the number of blades will reduce the flow rate. The design of circumferential grooves at the top of the blade can increase the pumping pressure to a certain extent, with little impact on the hemolysis performance. The impeller structure is optimized based on the estimated hemolysis of each impeller model blood pump. It could be seen that when the pump blood pressure and flow rate were reached, the optimized impeller speed was reduced by 11.4%, and the estimated hemolysis value was reduced by 10.5%. Conclusion: In this paper, the rotor impeller structure of the blood pump was optimized to improve the hydraulic and hemolytic performance effectively, which can provide a reference for the related research of the axial flow blood pump using hydraulic suspension.

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Section: Model and Methodsmentioning

confidence: 99%

Section: Model and Methodsmentioning

confidence: 99%

Section: Hemolytic Performance Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of rotor impeller structure on performance improvement of suspended axial flow blood pumps

Wang,

Yun,

Tang

et al. 2024

Int J Artif Organs

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show abstract

“…It can be employed to track the journey of platelets throughout the fluidic network or the displacement of critical regions (artificial valves and ventricles) under constraints, and to provide a reliable appreciation of the local mechanical state (Figure 6). Numerical simulations easily generate a large number of platelet trajectories and provide a "mechanical footprint" of the flow while highlighting regions with a higher risk of damage (Hatoum et al, 2021;Yang et al, 2022). Computing statistical distributions such as the probability density of the shear and exposure time from relevant trajectories offers a clear quantification of mechanical constraints, their intensity and frequency.…”

Section: Computational Fluid Dynamics: Numerical Modelling Of Local T...mentioning

confidence: 99%

Design of artificial vascular devices: Hemodynamic evaluation of shear-induced thrombogenicity

Feaugas

Newman²,

Calzuola³

et al. 2023

Front. Mech. Eng.

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Blood-circulating devices such as oxygenators have offered life-saving opportunities for advanced cardiovascular and pulmonary failures. However, such systems are limited in the mimicking of the native vascular environment (architecture, mechanical forces, operating flow rates and scaffold compositions). Complications involving thrombosis considerably reduce their implementation time and require intensive anticoagulant treatment. Variations in the hemodynamic forces and fluid-mediated interactions between the different blood components determine the risk of thrombosis and are generally not taken sufficiently into consideration in the design of new blood-circulating devices. In this Review article, we examine the tools and investigations around hemodynamics employed in the development of artificial vascular devices, and especially with advanced microfluidics techniques. Firstly, the architecture of the human vascular system will be discussed, with regards to achieving physiological functions while maintaining antithrombotic conditions for the blood. The aim is to highlight that blood circulation in native vessels is a finely controlled balance between architecture, rheology and mechanical forces, altogether providing valuable biomimetics concepts. Later, we summarize the current numerical and experimental methodologies to assess the risk of thrombogenicity of flow patterns in blood circulating devices. We show that the leveraging of both local hemodynamic analysis and nature-inspired architectures can greatly contribute to the development of predictive models of device thrombogenicity. When integrated in the early phase of the design, such evaluation would pave the way for optimised blood circulating systems with effective thromboresistance performances, long-term implantation prospects and a reduced burden for patients.

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Shape design of an artificial pump-lung using high-resolution hemodynamic simulation with high-performance computing

et al. 2023

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Accurate and fast prediction of the hemodynamics of the artificial pump-lung is critical in the design process. In this study, a comprehensive computational framework, including a sliding mesh method, a coupled free flow and porous media flow model, a hemolysis prediction method, a k-ω SST (shear stress transport) turbulence model, and solution algorithms, is introduced to accurately predict the velocity field, pressure heads and hemolysis. The framework is used to do the shape design of an artificial pump-lung on a supercomputer. High-resolution hemodynamics simulation results are obtained and analyzed, and the parallel performance of the algorithm is studied. The numerical results indicate that the proposed framework is capable of accurately predicting the velocity field, pressure heads, and hemolysis, and the performance of the designed artificial pump-lung meets the biocompatibility requirements. Additionally, the parallel performance results demonstrate the potential of the framework to efficiently perform the design of artificial pump-lungs using a large number of processors.

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CFD-Based Flow Channel Optimization and Performance Prediction for a Conical Axial Maglev Blood Pump

Cited by 4 publications

References 17 publications

Influence of rotor impeller structure on performance improvement of suspended axial flow blood pumps

Influence of rotor impeller structure on performance improvement of suspended axial flow blood pumps

Design of artificial vascular devices: Hemodynamic evaluation of shear-induced thrombogenicity

Shape design of an artificial pump-lung using high-resolution hemodynamic simulation with high-performance computing

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