Hydrodynamics of shear thinning fluid in a square microchannel: a numerical approach

IF 1 Q4 ENGINEERING, CHEMICAL Chemical Product and Process Modeling Pub Date : 2023-08-14 DOI:10.1515/cppm-2022-0076
S. Yadav, Bushra Khatoon, Shabih -Ul-Hasan, M. S. Alam
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Abstract

Abstract In this present work, a numerical study was conducted for the formation of a slug bubble for shear thinning non-Newtonian fluid in a cross-junction 2-D square horizontal microchannel. Carboxymethyl cellulose (CMC) of concentration 0.2 (w/w%) percent was used as a continuous phase that shows the shear thinning behavior of non-Newtonian fluid and Nitrogen (N2) was used as the discrete phase. The pressure-based double precision solver was used in ANSYS FLUENT 2021 R2 with the volume of fluid (VOF) method. The finite volume method is applied for the discretization of the continuity and momentum equation. This article also focuses on the fluctuation of static pressure, mechanism of slug, annular, and churn annular flow i.e., obtained by the variation in the inlet velocities. On the other hand, a concept that was applied in this work was also validated with the prior literature data.
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方形微通道中剪切稀化流体的流体力学:数值方法
摘要在本工作中,对交叉连接二维方形水平微通道中剪切稀化非牛顿流体段塞气泡的形成进行了数值研究。使用浓度为0.2(w/w)%的羧甲基纤维素(CMC)作为显示非牛顿流体的剪切稀化行为的连续相,并且使用氮气(N2)作为离散相。基于压力的双精度求解器在ANSYS FLUENT 2021 R2中使用,采用流体体积(VOF)法。将有限体积法应用于连续性和动量方程的离散化。本文还重点讨论了静压的波动、段塞流、环空流和搅拌环空流的机理,即通过入口速度的变化获得的波动。另一方面,本工作中应用的一个概念也通过先前的文献数据进行了验证。
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来源期刊
Chemical Product and Process Modeling
Chemical Product and Process Modeling ENGINEERING, CHEMICAL-
CiteScore
2.10
自引率
11.10%
发文量
27
期刊介绍: Chemical Product and Process Modeling (CPPM) is a quarterly journal that publishes theoretical and applied research on product and process design modeling, simulation and optimization. Thanks to its international editorial board, the journal assembles the best papers from around the world on to cover the gap between product and process. The journal brings together chemical and process engineering researchers, practitioners, and software developers in a new forum for the international modeling and simulation community. Topics: equation oriented and modular simulation optimization technology for process and materials design, new modeling techniques shortcut modeling and design approaches performance of commercial and in-house simulation and optimization tools challenges faced in industrial product and process simulation and optimization computational fluid dynamics environmental process, food and pharmaceutical modeling topics drawn from the substantial areas of overlap between modeling and mathematics applied to chemical products and processes.
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