This paper discusses the effect of peristaltic transport on the fluid flow in the gap between two eccentric tubes (eccentric-annulus flows). The inner tube is uniform, rigid, while the outer tube has a sinusoidal wave traveling down its wall. The flow analysis has been developed for low Reynolds number and long wave length approximation. The velocity and the pressure gradient have been obtained in terms of the dimensionless flow rate Q¯, time t, azimuthal coordinate θ and eccentricity parameter ϵ (the parameter that controls of the eccentricity of the inner tube position). The results show that there is a significant deference between eccentric and concentric annulus flows.

中文翻译：

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通过偏心缸的蠕动传输：数学模型

本文讨论了蠕动传输对两个偏心管之间的间隙中的流体流动（偏心环流）的影响。内管是均匀，刚性的，而外管则具有沿其壁向下传播的正弦波。已经针对低雷诺数和长波近似开发了流量分析。根据无因次流量获得了速度和压力梯度问¯，时间t，方位角坐标θ和偏心率参数ϵ（控制内管位置偏心率的参数）。结果表明，偏心环流和同心环流之间存在显着差异。