Insight into the dynamics of non-Newtonian carboxy methyl cellulose conveying CuO nanoparticles: significance of channel branch angle and pressure drop

Botong Li; Yuhang Chen; Zhong Huang; Yahui Meng

doi:10.1515/zna-2021-0151

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Insight into the dynamics of non-Newtonian carboxy methyl cellulose conveying CuO nanoparticles: significance of channel branch angle and pressure drop

Botong Li , Yuhang Chen , Zhong Huang und Yahui Meng

Veröffentlicht/Copyright: 31. August 2021

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Aus der Zeitschrift Zeitschrift für Naturforschung A Band 76 Heft 11

Abstract

Branching channels are commonly emerged in a considerable variety of engineering applications, in which most of the fluids present non Newtonian behavior, such as in chemical processes. It is noted that in the material forming process, when one suspends nanoparticles in a basic non Newtonian fluid, a completely new non Newtonian fluid is formed with different rheological characteristics from the former ones. In our present numerical research, considering the side branches inclined at varying angles, we focus on the fluid flow and heat transfer of the laminar power-law nanofluid in a rectangular branching channel under the influences of generalized Reynolds number. Both the consistency coefficient and power-law index of the non Newtonian nanofluid, different from those of the base fluid, are described by empirical formula, dependent on the nanoparticle quantity. Finite element method is applied in the research. It is found that a smaller branch angle α can cause a larger fluctuation in pressure near the branched region. Furthermore, negative pressures exist both in the main and side branch with some certain inclination angle. Above all, the new extensive results of velocity contours, temperature, concentration contours along with pressure drop of the changing rheological models provide detailed information for studies on non Newtonian nanofluids in many intricate industrial applications.

Keywords: branching channel; nanofluid; power-law fluid; rheological characteristics

Corresponding author: Botong Li, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China, E-mail: libotong@ustb.edu.cn

Funding source: Fundamental Research Funds for the Central Universities

Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: The work was supported by the Fundamental Research Funds for the Central Universities.
Conflict of interest statement: Authors declared that there is no conflict of interest.

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Received: 2021-06-01

Accepted: 2021-08-10

Published Online: 2021-08-31

Published in Print: 2021-11-25

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https://doi.org/10.1515/zna-2021-0151

Schlagwörter für diesen Artikel

branching channel; nanofluid; power-law fluid; rheological characteristics