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首页> 外文期刊>International journal of non-linear mechanics >Effect of surface irregularities on unsteady pulsatile flow in a compliant artery
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Effect of surface irregularities on unsteady pulsatile flow in a compliant artery

机译：表面不规则对顺应性动脉中不稳定脉动流的影响

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摘要

Of concern in the paper is an analytical study of pulsatile blood flow in an irregular stenosed arterial segment through a mathematical model. The model is two-dimensional and axisymmetric with an outline of the stenosis obtained from a three-dimensional casting of a mildly stenosed artery [L. Back, Y. Cho, D. Crawford, R. Cuffel, Effect of mild atherosclerosis on flow resistance in a coronary artery casting of man, J. Biomech. Eng. 106 (1984) 48-53]. The combined influence of an asymmetric shape and surface irregularities of the constriction has been explored in a computational study of blood flow through arterial stenosis with 48% areal occlusion. The moving wall of the artery is included to be anisotropic, linear, viscoelastic, incompressible circular cylindrical membrane shell. The effect of the surrounding connective tissues on the motion of the arterial wall is also paid due attention. Results are also obtained for a smooth stenosis model and also for a stenosis model representative by the cosine curve. An extensive quantitative analysis has been performed in non-uniform non-staggered grids through numerical computations for the effect of surface irregularities on the flow velocity, the flux, the resistive impedance and on the wall shear stress through their graphical representations so as to validate the applicability of such an improved mathematical model.
机译：本文关注的是通过数学模型对不规则狭窄的动脉节段中脉动血流的分析研究。该模型是二维的并且是轴对称的，具有从轻度狭窄的动脉的三维铸造获得的狭窄轮廓的轮廓[L. Back，Y.Cho，D.Crawford，R.Cuffel，轻度动脉粥样硬化对人冠状动脉铸件中流动阻力的影响，J.Biomech。 。 106（1984）48-53]。在通过48％面积闭塞的动脉狭窄血流的计算研究中，探索了不对称形状和收缩表面不规则的综合影响。动脉的活动壁包括各向异性的，线性的，粘弹性的，不可压缩的圆柱形圆柱膜壳。还应注意周围结缔组织对动脉壁运动的影响。还可以获得平滑的狭窄模型以及以余弦曲线表示的狭窄模型的结果。已通过数值计算在非均匀非交错网格中进行了广泛的定量分析，以通过图形表示对表面不规则性对流速，通量，电阻抗和壁面剪应力的影响，从而验证了这种改进的数学模型的适用性。

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