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Mesoscopic approach for simulating nanofluid flow and heat transfer in a finned multi-pipe heat exchanger

Jia-Bao Liu (School of Mathematics and Physics, Anhui Jianzhu University, Hefei, China)
Morteza Bayati (Department of Mechanical Engineering, Urmia University of Technology, Urmia, Iran)
Mazhar Abbas (Department of Management Sciences, COMSATS University Islamabad, Attock, Pakistan)
Alireza Rahimi (Faculty of Energy, University of Kashan, Kashan, Iran)
Mohammad Naderi (Tarbiat Modares University, Tehran, Iran)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 5 August 2019

Abstract

Purpose

The lattice Boltzmann method is used to simulate the nanofluid flow and heat transfer inside a finned multi-pipe heat exchanger.

Design/methodology/approach

The heat exchanger is filled with CuO-water nanofluid. The Koo–Kleinstreuer–Li (KKL) model is used to estimate the dynamic viscosity and considering the Brownian motion in the simulation. On the other hand, the influence of nanoparticles’ shapes on the heat transfer rate is considered, and the best efficient shape is selected to be used in the investigation.

Findings

The Rayleigh number, nanoparticle concentration and the thermal arrangements of internal active fins and bodies are the governing parameters. In addition, the impacts of these two parameters on the nanofluid flow, heat transfer rate, local and total entropy generation and heatline visualization are analyzed, comprehensively.

Originality/value

The originality of this work is using of lattice Boltzmann method for simulation of nanofluid flow and heat transfer during natural convection in a heat exchanger. Furthermore, influence of the shape of nanoparticles on the thermo-physical properties of nanofluid is analyzed using Koo–Kleinstreuer–Li correlation.

Keywords

Acknowledgements

The work was partially supported by the China Postdoctoral Science Foundation under Grant No. 2017M621579 and the Postdoctoral Science Foundation of Jiangsu Province under Grant No. 1701081B, Project of Anhui Jianzhu University under Grant no. 2016QD116 and 2017dc03.

Citation

Liu, J.-B., Bayati, M., Abbas, M., Rahimi, A. and Naderi, M. (2019), "Mesoscopic approach for simulating nanofluid flow and heat transfer in a finned multi-pipe heat exchanger", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 29 No. 8, pp. 2822-2839. https://doi.org/10.1108/HFF-11-2018-0625

Publisher

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Emerald Publishing Limited

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