Lagrangian μ-Particle Tracking Velocimetry Analysis of Microscale Flow over Structured Surfaces

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Industrial & Engineering Chemistry Research Pub Date : 2026-10-09 DOI:10.1021/acs.iecr.6c01159

Timo Merbach,Jan H. Nissen,Fabian Riebesehl,Lukas Rennpferdt,Christoph Wigger,Eike Steuwe,Marko Hoffmann,Hoc Khiem Trieu,Bodo Fiedler,Michael Schlüter,Alexandra v. Kameke,Felix Kexel

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Abstract

Abstract This work aims to provide an experimental basis for the improvement of (bio)reactors by studying flow over micro- and nanostructured surfaces, with a focus on microscale mass transport toward and away from the surface. μ-Particle tracking velocimetry is employed in a microreactor to experimentally obtain Lagrangian trajectories of flow-following tracer particles. The method also resolves three-dimensional, time-dependent velocity fields. The derived mean velocity profiles agree well with the theory of flow over porous walls. Beyond averaged Eulerian velocities, the Lagrangian framework captures near-surface interactions. The Lagrangian analysis of different surfaces indicates that rectangular structured microgrooves increase the wall contact of the tracer particles, especially when the flow is oriented perpendicular to the microgrooves. Particularly, this approach enables resolution of trapping phenomena and localized recirculation dynamics. Nanostructuring by growing a carbon nanotube forest increases surface area and modifies local fluid dynamics, thereby enhancing contact with (bio)catalysts that are potentially functionalized on the nanotubes in future applications.

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拉格朗日μ-粒子跟踪速度法分析结构表面上的微尺度流动

本工作旨在通过研究微纳米结构表面上的流动，重点研究微尺度的质量向表面和远离表面的传递，为改进（生物）反应器提供实验基础。在微反应器中采用μ粒子跟踪测速法，实验获得了流动跟随示踪粒子的拉格朗日轨迹。该方法还可以求解三维的、随时间变化的速度场。所得平均速度曲线与多孔壁面流动理论吻合较好。除了平均欧拉速度之外，拉格朗日框架还捕获了近地表的相互作用。不同表面的拉格朗日分析表明，矩形结构的微沟槽增加了示踪颗粒的壁面接触，特别是当流动方向与微沟槽垂直时。特别是，这种方法能够解决捕获现象和局部再循环动力学。通过种植碳纳米管森林的纳米结构增加了表面面积并改变了局部流体动力学，从而增强了与（生物）催化剂的接触，这些催化剂在未来的应用中有可能在纳米管上实现功能化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Industrial & Engineering Chemistry Research 工程技术-工程：化工

CiteScore

7.40

自引率

7.10%

发文量

1467

审稿时长

2.8 months

期刊介绍： ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.