A comparative study between flow visualization and computational fluid dynamic analysis for the sun medical centrifugal blood pump.
A comparative study between flow visualization and computational fluid dynamic analysis for the sun medical centrifugal blood pump.
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太阳医用离心血泵流动可视化与计算流体动力学分析的对比研究
DOI：
10.1111/j.1525-1594.2004.07161.x
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发表时间：
2004
影响因子：
2.4
通讯作者：
K. Yamazaki
中科院分区：
文献类型：
--
作者：
T. Yamane;Yusuke Miyamoto;K. Tajima;K. Yamazaki
进行了流动可视化实验和计算流体动力学（CFD）分析，并对结果进行了比较，以澄清离心泵原型设计的详细流体动力学特性，即Sun Medical的植入式心室辅助系统，其血液相容性先前已在一系列动物实验中得到证明。流场显示采用粒子跟踪测速仪，CFD分析采用STAR-CD软件。研究结果如下：（1）.在弯曲开式叶轮周围没有流动分离。（二）、诱导器和叶片-轴间隙的抗血栓形成设计概念可有效地沿着轴表面产生轴向速度，并对静止流体产生适当的剪切速率。（三）、通过流动显示，可以清楚地观察到出口处的非定常旋涡脱落，这对流体动力学效率产生了不利影响。通过流动显示和CFD分析测量的速度分布的比较显示出相当好的相关性。我们的研究结果表明，叶轮是适合于植入式人工心脏。流动可视化和CFD分析技术是研究和开发工作中的互补评估工具。
Flow visualization experiments and computational fluid dynamic (CFD) analyses were performed and the results were compared to clarify the detailed fluid dynamic characteristics for the prototype design of a centrifugal pump, namely, an implantable ventricular assist system from Sun Medical, whose hemocompatibility was previously demonstrated in a series of animal experiments. The flow visualization was conducted with particle tracking velocimetry, and the CFD analysis was performed with STAR-CD software. The findings were as follows: (1). There were no flow separations around the curved open impeller. (2). Antithrombogenic design concepts for the inducer and the vane-shaft clearance were effective in producing axial velocity along the shaft surface and generat-ing suitable shear rates against the stationary fluid. (3). Unsteady vortex shedding in the outlet, which adversely affected the fluid dynamic efficiency, was observed clearly by flow visualization. Comparison of velocity distribution measured by flow visualization and CFD analysis showed reasonably good correlation. Our findings indicate that the impeller is suitable for an implantable artificial heart. The techniques of flow visualization and CFD analysis are complementary evaluation tools in research and development efforts.