Kato Takuma, Kawano Satoyuki, Nakahashi Kazuhiro, Yambe Tomoyuki, Nitta Shin-ichi, Hashimoto Hiroyuki
Department of Aeronautics and Space Engineering, Tohoku University, Sendai, Japan.
Artif Organs. 2003 Jan;27(1):41-8. doi: 10.1046/j.1525-1594.2003.07191.x.
Computational flow visualization in the casing of vibrating flow pump (VFP) was made for various conditions based on the novel techniques of fluid dynamics. VFP type artificial heart can generate the oscillated flow and can be applied to the left ventricular assist device. Flow pattern of blood in an artificial heart is closely connected to mechanical performance and serious biomechanical problems such as hemolysis and blood coagulation. To effectively design the VFP for a left ventricular assist device, the numerical codes for solving Navier-Stokes equations were developed for three-dimensional blood flow based on the finite volume method. Furthermore, the simulation techniques based on the artificial compressibility method and the unstructured grid were also developed here. The numerical calculations were based on the precise configurations and the flow conditions of the prototype device. From the viewpoint of computational fluid dynamics (CFD), the detailed discussion of flow patterns in the casing of VFP, which were closely connected with hemolysis and blood coagulation, was made and the computational results were visualized by the use of the recent technique of computational graphics. Some useful design data of VFP were presented.
基于流体动力学的新技术，针对各种工况对振动流泵（VFP）泵壳内的流动进行了计算可视化。VFP型人工心脏能够产生振荡流，可应用于左心室辅助装置。人工心脏内血液的流动模式与机械性能以及诸如溶血和凝血等严重的生物力学问题密切相关。为了有效地设计用于左心室辅助装置的VFP，基于有限体积法开发了用于求解三维血流的Navier-Stokes方程的数值代码。此外，这里还开发了基于人工可压缩性方法和非结构化网格的模拟技术。数值计算基于原型装置的精确构型和流动条件。从计算流体动力学（CFD）的角度，对与溶血和凝血密切相关的VFP泵壳内的流动模式进行了详细讨论，并利用最新的计算图形技术将计算结果可视化。给出了一些关于VFP的有用设计数据。
