180°管内脉动流动的运动学与动力学特性

Q4 Biochemistry, Genetics and Molecular Biology

Molecular & Cellular Biomechanics Pub Date : 2020-01-01 DOI:10.32604/mcb.2019.07854

T. Hung, Ruei-Hung Kuo, C. Chiang

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引用次数: 0

摘要

从瞬态管状边界层的运动学和动力学特性出发，对人主动脉弓内的脉动流进行了研究。结果只能通过快速加速和减速收缩流的三维流体动力学(CFD)分析得到。流动基于规定的进口速度VO(t)，可以表示为瞬时雷诺数Re(t) = ρ dvo /μ，其中D为管径，ρ为血液密度，μ为动态粘度。计算压力场需要一个下游端段的参考压力。压力是基于冯永昌教授的《生物力学:循环》一书中的脉搏。采用Hirt等人提出的Navier-Stokes方程的任意Lagrangian-Eulerian (ALE)公式的有限体积法[2]。

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Kinematic and Dynamic Characteristics of Pulsating Flow in 180�Tube

: Kinematic and dynamic characteristics of pulsating flow in a model of human aortic arch are obtained by a computational analysis. Three-dimensional flow processes are summarized by pressure distributions on the symmetric plane together with velocity and pressure contours on a few cross sections for systolic acceleration and deceleration. Without considering the effects of aortic tapering and the carotid arteries, the development of tubular boundary layer with centrifugal forces and pulsation are also analyzed for flow separation and backflow during systolic deceleration.

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来源期刊

Molecular & Cellular Biomechanics CELL BIOLOGYENGINEERING, BIOMEDICAL&-ENGINEERING, BIOMEDICAL

CiteScore

1.70

自引率

0.00%

发文量

期刊介绍： The field of biomechanics concerns with motion, deformation, and forces in biological systems. With the explosive progress in molecular biology, genomic engineering, bioimaging, and nanotechnology, there will be an ever-increasing generation of knowledge and information concerning the mechanobiology of genes, proteins, cells, tissues, and organs. Such information will bring new diagnostic tools, new therapeutic approaches, and new knowledge on ourselves and our interactions with our environment. It becomes apparent that biomechanics focusing on molecules, cells as well as tissues and organs is an important aspect of modern biomedical sciences. The aims of this journal are to facilitate the studies of the mechanics of biomolecules (including proteins, genes, cytoskeletons, etc.), cells (and their interactions with extracellular matrix), tissues and organs, the development of relevant advanced mathematical methods, and the discovery of biological secrets. As science concerns only with relative truth, we seek ideas that are state-of-the-art, which may be controversial, but stimulate and promote new ideas, new techniques, and new applications.