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管壁切
相关语句
  wall shear
    Effect of the Poiseuille Flow Through the Stenosed Arteries on Wall Shear Stress
    狭窄动脉血管中Poiseuille流动对管壁切应力的影响
短句来源
    The mean wall shear stress(WSS)of the carotid bifurcation was 0.37~9.21 Pa. There was a large region of low WSS at the carotid bulb,ranging from 0.23 to 0.28 Pa. Also there was a small region of low WSS at the outer wall of the ECA (0.37~0.42 Pa)and the inner wall of the ICA(0.32~0.37 Pa)respectively.
    (3)管壁切应力平均值范围为0.37~9.21 Pa,在颈动脉球部发现大范围的低切应力区,大小为0.23~0.28 Pa,颈外动脉外侧壁及颈内动脉内侧壁区存在一小范围低切应力区,分别为0.37~0.42 Pa和0.32~0.37 Pa。
短句来源
    Numerical Study of Wall Shear Stress in the Stenosed Arteries
    狭窄动脉血管中管壁切应力的数值研究
短句来源
    Velocities and wall shear stress were obtained by solving linearlzed N-S equations andWall equation.
    求解线化的Navier-St.okes血流方程和管壁方程,得出速度剖面和管壁切应力。
短句来源
    The results show that local vessel expansion will induce the nonuniform distribution of the wall shear stress in the local expansion region, which will probably cause the extension of the vascular wall.
    指出局部扩张将引起局部扩张段内管壁切应力的非均匀分布 ,并可能因此促使血管壁的进一步扩张。
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  “管壁切”译为未确定词的双语例句
    On the basis of the quasi-steady assumption, the traditional quasi-steady friction model in liquid transients is proposed and its numerical solution with the method of characteristics is obtained.
    采用“拟稳态”假设,推导拟稳态管壁切应力的计算公式,建立目前瞬变分析常用的传统拟稳态摩阻模型,并结合特征线法建立其数值计算模型;
短句来源
    The Distribution for Shear Stress of Vessel Wall in a Tapered Vessel under Unsteady Blood Flow
    锥形血管中非定常流动的管壁切应力分布
短句来源
    The shear stress on arterial wall in flow-separation region
    分离区内的动脉管壁切应力分布
    Poiseuille flow through the stenosed arteries is analyzed numerically and its effect on the flow field of stenosed region is studied.
    对血管入口流动为Poiseuille流动时,血液流动对血管狭窄部位的管壁切应力及压力等的影响进行研究。
短句来源
    Then,based on the analysis of the stress characteristics of the simplified mathematical model and on a series of supposed premise such as unsteady pipe flow,using Newton's law and time-domain method of the classical control theory,the paper analyzes the wall shearing stress equation under laminar and turbulent flows and the energy dissipation under turbulent flow condition,and also gives the maximum size of step function input and the equation of equivalent linear damping ratio.
    在简化数学模型受力特性分析和非稳态管流等一系列假定条件的基础之上,利用牛顿定律和经典控制理论中的时域法,分析了层流和紊流状态的管壁切应力公式及紊流状态的能量损耗,并给出阶跃输入下的最大振幅和等价线性阻尼率公式。
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  wall shear
Nonlinear evolution of turbulent spots in the near-wall shear flow
      
Wall shear stress in the bulge part of the channel shows smaller values that affect largely the rate of heat transfer and Nusselt number shows minimum values in this region.
      
Generally, however, these are accompanied by considerable increases in wall shear-stress.
      
Results also show that predictions obtained with temperature variable nanofluid properties yield greater heat transfer capabilities and lower wall shear stresses when compared to predictions using constant properties.
      
Finally, the wall shear stress distributions on the side, top and bottom walls of the square duct with the Mach 4 pseudo-shock wave were investigated qualitatively by the shear stress-sensitive liquid crystal visualization method.
      
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In this paper a mathematical model is developed for the description of the pulsatile blood flow through an axisymmetric artery of mild varying cross-section, taking into account the tethering effect of the sorrounding tissues. Based on the linear Navier-Stokes equation and boundary conditions a set of differential equations for the modulus of phase velocity, blood velocities, pressure and defomation of the vessel wall are deduced and the numerical solutions are found by utilizing the Ru-nge-Kutta method. The...

In this paper a mathematical model is developed for the description of the pulsatile blood flow through an axisymmetric artery of mild varying cross-section, taking into account the tethering effect of the sorrounding tissues. Based on the linear Navier-Stokes equation and boundary conditions a set of differential equations for the modulus of phase velocity, blood velocities, pressure and defomation of the vessel wall are deduced and the numerical solutions are found by utilizing the Ru-nge-Kutta method. The axial velocity profiles and the peek wall shear stresses are given for both mild tapering tube and mild stenosed tube. It is shown that the peek wall shear stresses in the tethered tube are higher than those in the free tube. It is also shown that in a series of previously researching works of the peek wall shear stresses of varying cross-section vessels the free vessel assumption has the tendency of low assessing the peek wall shear stresses and the rigid vessel assumption opposite.

本文从粘性流体的线化Navier-Stokes方程和近似的弹性管壁运动方程出发导得了在粘弹性约束作用下缓慢变化圆截面弹性管中脉动血流的波速、速度分布和压力所满足的方程组。通过数值计算求出了缓慢锥削和缓慢狭窄管中的速度分布和管壁切应力。与自由管相比,考虑粘弹性约束情况下的壁切应力峰值要高一些。

ABSTRACT

本文将Tarbell等提出的利用流量波形计算刚性管壁切应力的方法〔5〕拓广应用到弹性薄壁管和厚壁管之中。结果表明,与刚性管模型比之,利用弹性薄壁管和厚壁管模型所计算的血管壁切应力更加符合Miller等〔4〕所给出的实验数据。

Abnormal hemodynamic behavier associated with constriction in a curved blood vessel, commonly referred to as a stenosis, has been thought to play an important role in the development and progression of focal vascular lesson. There were various interesting fluid mechanical phenomena due to the combined effect of curvature and stenosis. The present study was undertaken to investigate the mechanics of steady flow through a curved artery with an axisymmetric stenosis. Based on some assumptions, the analytical solutions...

Abnormal hemodynamic behavier associated with constriction in a curved blood vessel, commonly referred to as a stenosis, has been thought to play an important role in the development and progression of focal vascular lesson. There were various interesting fluid mechanical phenomena due to the combined effect of curvature and stenosis. The present study was undertaken to investigate the mechanics of steady flow through a curved artery with an axisymmetric stenosis. Based on some assumptions, the analytical solutions was obtained from Navier-Stokes Equation which governed blood flow in a curved stenosed artery by using perturbation method. Then the analytical expressions of velocity components, pressure and shear stress components were obtained. The general approach in present study was thought as an extension and modifications of the earlier work about flow in a straight stenosed tube and curved uniform tube.

与血管狭窄有关的异常血液动力学特征在血管疾病的发生和发展过程中起着重要的作用,由于血管狭窄和弯曲的综合影响,将会出现一系列有趣的流体力学现象,本文研究具有对称狭窄的弯曲小动脉内定常血液流动,在一定的假设条件下,直接从支配血液流动的Navier-Stokes方程求出问题的摄动解,由此求得弯曲狭窄管內血液流动的轴向速度、二次流速度及压力梯度等分析表达式,并进一步求得轴向和周向血管壁切应力。本文的结果是先前有关狭窄直管和弯曲均匀管流动研究的拓广。

 
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