Selective pumping in a network: insect-style microscale flow transport
Selective pumping in a network: insect-style microscale flow transport
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DOI：
10.1088/1748-3182/8/2/026004
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发表时间：
2013-06-01
影响因子：
3.4
通讯作者：
Staples, Anne E.
中科院分区：
文献类型：
--
作者：
Aboelkassem, Yasser;Staples, Anne E.
本文提出了一种在微尺度流动状态下复杂通道网络中选择性泵送流体的新范例。该模型的灵感来自于在许多昆虫气管网络中观察到的有节奏的壁收缩所产生的内部流动分布。这里提出的方法是一个自然的扩展以前的二维建模昆虫启发的微尺度流传输在一个单一的通道，目的是有效地操纵流体在微尺度网络，而不使用任何机械阀。这种选择性泵送方法使流体能够被输送、控制并精确地引导到网络中的特定分支中，同时避免其他可能的路线。为了提出一个定量分析的选择性泵送的方法在这里提出的，速度和压力场和时间平均净流量，所引起的规定的壁收缩数值计算使用的基本解的方法。更具体地说，Stokeslets-meshfree方法是用于在这项研究中解决的斯托克斯方程，管理网络中的流动运动与移动壁收缩。这里提出的结果可能有助于理解昆虫呼吸系统功能的一些特征，并指导制造用于流动传输和混合的新型微流体装置以及靶向药物递送应用的努力。
A new paradigm for selective pumping of fluids in a complex network of channels in the microscale flow regime is presented. The model is inspired by internal flow distributions produced by the rhythmic wall contractions observed in many insect tracheal networks. The approach presented here is a natural extension of previous two-dimensional modeling of insect-inspired microscale flow transport in a single channel, and aims to manipulate fluids efficiently in microscale networks without the use of any mechanical valves. This selective pumping approach enables fluids to be transported, controlled and precisely directed into a specific branch in a network while avoiding other possible routes. In order to present a quantitative analysis of the selective pumping approach presented here, the velocity and pressure fields and the time-averaged net flow that are induced by prescribed wall contractions are calculated numerically using the method of fundamental solutions. More specifically, the Stokeslets-meshfree method is used in this study to solve the Stokes equations that govern the flow motions in a network with moving wall contractions. The results presented here might help in understanding some features of the insect respiratory system function and guide efforts to fabricate novel microfluidic devices for flow transport and mixing, and targeted drug delivery applications.