Electrically actuated peristaltic transport of viscoelastic fluid: a theoretical analysis

IF 2.3 4区 工程技术 Q2 INSTRUMENTS & INSTRUMENTATION
Mahesh Kumar, Pranab Kumar Mondal
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Abstract

In this article, we discuss the bioinspired peristaltic pumping mechanism of an elastic non-Newtonian fluid whose rheology is characterized by the Phan-Thien-Tanner model in a microfluidic configuration. We consider the effect of an electroosmotic body force originating from electrical double layer phenomena formed in the wall of the fluidic channel of finite length. The considered configuration is consistent with the natural contraction of the oesophagus wall that does not involve expansion beyond the stationary boundary. Employing lubrication theory and assuming the underlying flow to be in the creeping flow regime, we outline the transport equations pertaining to the chosen peristaltic set up. The transport equations are then solved using a well-established method consistent with perturbation technique. By depicting the pressure variation and wall shear stress graphically for a continuous wave train, we aptly discuss the time-averaged net throughput and flow developed at channel inlet of the chosen pathway and demonstrate the eventual consequences of these flow patterns for a window of viscoelastic and electrokinetic parameters. The outcomes obtained from this model establishes that the underlying flow owing to the peristaltic pumping mechanism strongly relies on the rheological parameter \(\varepsilon W{e}^{2}\). These inferences are expected to be of extensive importance in designing peristalsis pump, mimicking features of the physiological system, for achieving unidirectional flow of complex fluids with improved efficiency, frequently used in biochemical/biomicrofluidic applications.

Abstract Image

粘弹性流体的电动蠕动输送:理论分析
在这篇文章中,我们讨论了微流体结构中流变学以 Phan-Thien-Tanner 模型为特征的弹性非牛顿流体的生物启发蠕动泵机制。我们考虑了有限长度流体通道壁上形成的电双层现象所产生的电渗体力的影响。所考虑的配置与食道壁的自然收缩一致,不涉及超出静止边界的扩张。利用润滑理论并假设基本流动为蠕动流动,我们概述了与所选蠕动装置有关的传输方程。然后,使用与扰动技术相一致的成熟方法求解输运方程。通过对连续波列的压力变化和壁面剪应力进行图形化描述,我们恰如其分地讨论了所选通道入口处的时均净吞吐量和流量,并展示了这些流动模式对粘弹性和电动参数窗口的最终影响。该模型得出的结果表明,蠕动泵机制导致的基本流动在很大程度上依赖于流变参数(\varepsilon W{e}^{2}\)。这些推论对于设计蠕动泵、模仿生理系统的特征、实现复杂流体的单向流动并提高其效率具有广泛的意义,这些应用经常被用于生化/生物微流体领域。
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来源期刊
Microfluidics and Nanofluidics
Microfluidics and Nanofluidics 工程技术-纳米科技
CiteScore
4.80
自引率
3.60%
发文量
97
审稿时长
2 months
期刊介绍: Microfluidics and Nanofluidics is an international peer-reviewed journal that aims to publish papers in all aspects of microfluidics, nanofluidics and lab-on-a-chip science and technology. The objectives of the journal are to (1) provide an overview of the current state of the research and development in microfluidics, nanofluidics and lab-on-a-chip devices, (2) improve the fundamental understanding of microfluidic and nanofluidic phenomena, and (3) discuss applications of microfluidics, nanofluidics and lab-on-a-chip devices. Topics covered in this journal include: 1.000 Fundamental principles of micro- and nanoscale phenomena like, flow, mass transport and reactions 3.000 Theoretical models and numerical simulation with experimental and/or analytical proof 4.000 Novel measurement & characterization technologies 5.000 Devices (actuators and sensors) 6.000 New unit-operations for dedicated microfluidic platforms 7.000 Lab-on-a-Chip applications 8.000 Microfabrication technologies and materials Please note, Microfluidics and Nanofluidics does not publish manuscripts studying pure microscale heat transfer since there are many journals that cover this field of research (Journal of Heat Transfer, Journal of Heat and Mass Transfer, Journal of Heat and Fluid Flow, etc.).
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