Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON, M5S 3G8, Canada.
Med Biol Eng Comput. 2011 Mar;49(3):325-35. doi: 10.1007/s11517-010-0705-z. Epub 2010 Nov 16.
Computational modeling of bileaflet mechanical heart valve (BiMHV) flow requires experimentally validated datasets and improved knowledge of BiMHV fluid mechanics. In this study, flow was studied downstream of a model BiMHV in an axisymmetric aortic sinus using stereoscopic particle image velocimetry. The inlet flow was steady and the Reynolds number based on the aortic diameter was 7600. Results showed the out-of-plane velocity was of similar magnitude as the transverse velocity. Although additional studies are needed for confirmation, analysis of the out-of-plane velocity showed the possible presence of a four-cell streamwise vortex structure in the mean velocity field. Spatial data for all six Reynolds stress components were obtained. Reynolds normal stress profiles revealed similarities between the central jet and free jets. These findings are important to BiMHV flow modeling, though clinical relevance is limited due to the idealized conditions chosen. To this end, the dataset is publicly available for CFD validation purposes.
双叶机械心脏瓣膜（BiMHV）流动的计算建模需要经过实验验证的数据集和对 BiMHV 流体力 学的改进认识。在这项研究中，使用立体粒子图像测速法研究了轴对称主动脉窦内模型 BiMHV 下游的流动。入口流动是稳定的，基于主动脉直径的雷诺数为 7600。结果表明，离平面速度与横向速度具有相似的大小。尽管需要进一步的研究来确认，但对离平面速度的分析表明，在平均速度场中可能存在四单元流向涡旋结构。获得了所有六个雷诺应力量的空间数据。雷诺法向应力分布揭示了中心射流和自由射流之间的相似性。这些发现对于 BiMHV 流动建模很重要，尽管由于选择了理想化的条件，临床相关性有限。为此，该数据集可用于 CFD 验证目的。
