应用于微通道中三维液-液泰勒流的两种数值方法的比较研究

IF 1.1 4区工程技术 Q4 MECHANICS

Journal of Applied Fluid Mechanics Pub Date : 2024-01-01 DOI:10.47176/jafm.17.1.2157

M. Said, N. N. Bouda, S. Harmand

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引用次数: 0

摘要

微型和微通道中的层流性质促使研究人员开发新的解决方案，以克服反应速率降低和热量/质量传递问题。在这方面，泰勒流是一种可行的解决方案，可用于在合理压降的情况下加强微型和微通道内的混合。本研究采用两种不同的液滴生成方法，即 T 型交界法和修补法，对泰勒液-液流动的流体力学进行了数值研究。为此，考虑了矩形微通道流动的三维模型。计算域由 ICEM CFD 设计和网格划分，然后使用商业软件 ANSYS Fluent 进行模拟。两相之间的界面采用流体体积法（VOF）捕捉。详细讨论了这两种方法在乙烯/丙二醇载相中分散水滴的生成和发展过程。结果表明，两种方法在液膜和液滴形状方面都表现出令人满意的性能，只是略有不同。不过，从计算时间上看，贴片法更为经济。这项研究将改善微通道中两相流模拟的知识状况，从而促进对泰勒流流体力学的理解。

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A Comparative Study of Two Numerical Methods Applied for 3D Liquid-Liquid Taylor Flow in a Microchannel

The laminar nature of flow in mini and microchannels has pushed researchers to develop novel solutions to overcome reaction rate reduction and heat/mass transfer issues. In this regard, Taylor flow is one of the possible solutions that could be used to enhance mixing inside mini and microchannels with reasonable pressure drop. The hydrodynamics of Taylor liquid-liquid flow is numerically studied in this work by employing two different droplet generation methods, specifically T-junction and patching methods. To this end, a three-dimensional model of rectangular microchannel flow is considered. The computational domain was designed and meshed by ICEM CFD and then simulated with commercial software ANSYS Fluent. The interface between the two phases was captured using the Volume of Fluid (VOF) method. The generating and development process of water droplets dispersed in an ethylene/propylene glycol carrier phase for both methods is discussed in detail. According to the results, both methods show satisfactory performance regarding liquid film and droplet shape, with only a slight difference. However, the patching method was found to be more economical in terms of computational time. This study would improve the state of knowledge on two-phase flow simulation in microchannels and thus contribute to the understanding of Taylor flow hydrodynamics.

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来源期刊

Journal of Applied Fluid Mechanics THERMODYNAMICS-MECHANICS

CiteScore

2.00

自引率

20.00%

发文量

138

审稿时长

>12 weeks

期刊介绍： The Journal of Applied Fluid Mechanics (JAFM) is an international, peer-reviewed journal which covers a wide range of theoretical, numerical and experimental aspects in fluid mechanics. The emphasis is on the applications in different engineering fields rather than on pure mathematical or physical aspects in fluid mechanics. Although many high quality journals pertaining to different aspects of fluid mechanics presently exist, research in the field is rapidly escalating. The motivation for this new fluid mechanics journal is driven by the following points: (1) there is a need to have an e-journal accessible to all fluid mechanics researchers, (2) scientists from third- world countries need a venue that does not incur publication costs, (3) quality papers deserve rapid and fast publication through an efficient peer review process, and (4) an outlet is needed for rapid dissemination of fluid mechanics conferences held in Asian countries. Pertaining to this latter point, there presently exist some excellent conferences devoted to the promotion of fluid mechanics in the region such as the Asian Congress of Fluid Mechanics which began in 1980 and nominally takes place in one of the Asian countries every two years. We hope that the proposed journal provides and additional impetus for promoting applied fluids research and associated activities in this continent. The journal is under the umbrella of the Physics Society of Iran with the collaboration of Isfahan University of Technology (IUT) .