Comparison of flow in numerical and physical models of a ventricular assist device using low-and high-viscosity fluids

C. S. Konig; C. Clark; M. R. Mokhtarzadeh-Dehghan

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Comparison of flow in numerical and physical models of a ventricular assist device using low-and high-viscosity fluids

机译：使用低粘度和高粘度流体的心室辅助设备的数值模型和物理模型中的流量比较

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The flows in a model of a ventricular assist device (VAD) were investigated numerically and experimentally for two different Newtonian test fluids. These were a blood analogue fluid and a much higher viscosity fluid. A finite volume method wasemployed to solve the governing equations for a three-dimensional unsteady laminar flow on a transient grid. The numerical solutions were compared with experimental results from an identical physical model. The experimental flows were investigated by flow visualization and by laser Doppler velocity measurements at selected points in the flow field. The validation was based on comparisons of flow patterns and of one-component velocity-time histories. The maximum Reynolds numbers in the inflow tube of themodel VAD were approximately 460 and 3300 using the high- and low-viscosity fluids respectively. The investigation showed that the flow patterns were better predicted for the high-viscosity fluid. However, the agreement between the velocity-time histories was found to be slightly better for the low-viscosity fluid. The discrepancies in the flow patterns may be due to intermittent turbulence with a further contribution from numerical diffusion.

机译：对两种不同的牛顿试验液进行了数值和实验研究，研究了心室辅助装置（VAD）模型中的流动。这些是血液模拟液体和高得多的粘度液体。运用有限体积方法求解了瞬态网格上三维非定常层流的控制方程。将数值解与相同物理模型的实验结果进行了比较。通过流动可视化和流场中选定点的激光多普勒速度测量研究了实验流动。验证基于流型和单组分速度-时间历史的比较。使用高粘度和低粘度流体，VAD型流入管中的最大雷诺数分别约为460和3300。研究表明，对于高粘度流体，其流型得到了更好的预测。但是，对于低粘度流体，速度-时间历史之间的一致性被发现要好一些。流动模式的差异可能是由于间歇性湍流引起的，另外还有数值扩散的影响。

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《Proceedings of the Institution of Mechanical Engineers, Part H. Journal of Engineering in Medicine》 |1999年第h5期|共10页
作者
C. S. Konig; C. Clark; M. R. Mokhtarzadeh-Dehghan;
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正文语种 eng
中图分类专用机械与设备;
关键词
Ventricular assist device; Model; Computational fluid dynamics; Unsteady flow; Laminar flow; Newtonian; Moving boundaries; Experimental validation;

机译：心室辅助装置;模型;计算流体力学;非定常流动;层流;牛顿法;运动边界;实验验证;

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1. Comparison of flow in numerical and physical models of a ventricular assist device using low-and high-viscosity fluids [J] . C. S. Konig, C. Clark, M. R. Mokhtarzadeh-Dehghan Proceedings of the Institution of Mechanical Engineers, Part H. Journal of Engineering in Medicine . 1999,第H5期

机译：使用低粘度和高粘度流体的心室辅助设备的数值模型和物理模型中的流量比较
2. Investigation of unsteady flow in a model of a ventricular assist device by numerical modelling and comparison with experiment. [J] . Konig CS, Clark C, Mokhtarzadeh Dehghan-MR Medical engineering & physics. . 1999,第1期

机译：通过数值模拟研究心室辅助装置模型中的非稳态流动，并与实验进行比较。
3. A computational fluid dynamics comparison between different outflow graft anastomosis locations of Left Ventricular Assist Device (LVAD) in a patient-specific aortic model [J] . Caruso Maria Vittoria, Gramigna Vera, Rossi Michele, Communications in Numerical Methods in Engineering . 2015,第2期

机译：在特定于患者的主动脉模型中，左心室辅助装置（LVAD）的不同出口移植物吻合位置之间的计算流体动力学比较
4. Performance Analysis of Axial Flow Left Ventricular Assist Devices Under different working modes Based on the Numerical Model [C] . Yiming Wang, Yunpeng Zhang, Xiangyu Wu International Conference on Electronics, Circuits and Information Engineering . 2021

机译：基于数值模型的不同工作模式下轴向流动左心室辅助装置的性能分析
5. Recovery of stunned myocardium: Experimental determination of hemodynamic effects and numerical modeling of the influence of ventricular assist devices [D] . Reichenbach, Steven Henry 1992

机译：恢复昏迷的心肌：血液动力学效应的实验确定和心室辅助装置影响的数值模型
6. Comparison of fluid dynamic numerical models for a clinical ventricular assist device and experimental validation [O] . Jiafeng Zhang, Pei Zhang, Katharine H. Fraser, -1

机译：临床室心辅助装置流体动力学数值的比较和实验验证
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Comparison of flow in numerical and physical models of a ventricular assist device using low-and high-viscosity fluids

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