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首页> 外文期刊>Journal of aerospace engineering >Net Annulus Flow of a Compressible Viscous Liquid with Peristalsis
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Net Annulus Flow of a Compressible Viscous Liquid with Peristalsis

机译：蠕变可压缩粘性液体的净环空流动

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摘要

The axisymmetric peristaltic flow of a viscous compressible liquid through the gab between iwo coaxial tubes (annulus) was studied. This peristaltic flow is actually a result of the influence of ultrasonic radiation on the flow of a liquid through an annulus, which deforms the walls of the outer tube in the shape of traveling transversal waves exactly like peristaltic pumping. Those traveling transversal waves induce a net flow of the liquid inside the annulus. This problem has numerous applications in various branches of science, including stimulation of fluid flow in the annulus under the effect of elastic waves and studies of blood flow dynamics in living creatures. The wave amplitude is related to the power output of an acoustic source. A perturbation technique was employed to analyze the problem where the amplitude ratio (wave amplitude/ outer tube radius at inlet) is chosen as a parameter. In the second-order approximation, a net flow induced by the traveling wave was calculated for various values of the compressibility of the liquid, the Reynolds number, the radius ratio, and the wavelength parameter. The calculations disclose that the compressibility of the liquid, the Reynolds number, and the radius ratio have an apparent influence on the net flow. Furthermore, the net axial velocity at the wall and in the annulus gab is numerically discussed.
机译：研究了粘性可压缩液体通过同轴同轴管（环）之间的隔空的轴对称蠕动流。这种蠕动流实际上是超声波辐射对通过环空的液体流的影响的结果，这使外管壁变形为行进的横向波，就像蠕动泵浦一样。那些行进的横向波引起环内部的液体净流动。这个问题在科学的各个领域都有许多应用，包括在弹性波的作用下刺激环空中的流体流动以及对生物体内血液流动动力学的研究。波振幅与声源的功率输出有关。采用摄动技术来分析选择振幅比（波振幅/入口处的外管半径）作为参数的问题。在二阶近似中，针对液体的可压缩性，雷诺数，半径比和波长参数的各种值，计算了由行波引起的净流量。计算结果表明，液体的可压缩性，雷诺数和半径比对净流量有明显影响。此外，对壁和环隙处的净轴向速度进行了数值讨论。

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