题名异形流动腔的数值分析和设计优化
作者胡嘉
学位类别硕士
答辩日期2002
授予单位中国科学院研究生院
授予地点北京
导师陶祖莱
关键词流动腔 几何因素 流型 内皮细胞 Flow Chamber Geometry Character Flow Pattern Endothelial Cell
学位专业一般力学与力学基础
中文摘要动脉粥样硬化的非随机发生与当地的流体动力环境有关。完全模拟体内血流动力学环境是不可能的。我们的思路是将复杂的血管形态,分解成若干几何因素,尽可能地研究某一几何因素对流场和血管内皮细胞生长的影响。在体外实验中,为了便于在线观测,主要采用流动腔(Flow Chamber)技术。不同于国内外己有的研究,我们主要研究几何因素引起的流型的改变及其对血管内皮细胞生长的影响。本论文主要是用数值方法来研究五种几何因素(扩张、弯曲、驻点、分叉和后向台阶)引起的流型特征。分析各参数的影响,进而优化设计。为在体外进行血管内皮细胞培养实验,研究不同流场条件下由于几何形状改变引起的流场特性改变对内皮细胞生长的影响,提供理论依据。
索取号29987
英文摘要Arterial hemodynamic forces may play a role in the localization of early atherosclerotic lesions. And in vitro study, it is impossible to simulate in vivo environment entirely. The aim of this study is to uncouple complex arterial geometries and hemodynamic parameters to several simple flow patterns and then elucidate the effect of each flow pattern to the flow field and endothelial cell cultured in this field. In vitro study, flow chamber apparatus is convenient for on line observation. It was shown that the spatial characteristic of fluid flow would influence local function of vascular endothelial cells. The growth of endothelial cells was not only related to the mean magnitude of shear stress, but also related to the spatial distribution of shear stress. The computational methods were used to analyze flow field in a series of complex flow chambers with five characters such as expansion, curve, stagnation point, bifurcation and backward-facing step, In conclusion, these results possessed practical importance in designing the flow chamber and analyzing the mechanical behavior of the cells in these flow chambers.
语种中文
学科主题一般力学与力学基础
公开日期2009-04-13 ; 2009-08-25
出处[硕士论文].北京.中国科学院力学研究所,2002
内容类型学位论文
源URL[http://dspace.imech.ac.cn/handle/311007/23152]  
专题力学研究所_力学所知识产出(1956-2008)
推荐引用方式
GB/T 7714
胡嘉. 异形流动腔的数值分析和设计优化[D]. 北京. 中国科学院研究生院. 2002.
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