CFD approach for two-phase CuO nanofluid flow through heat exchangers enhanced by double perforated louvered strip insert

Erfanian Nakhchi Toosi, Mahdi and Esfahani, J.A. (2020) CFD approach for two-phase CuO nanofluid flow through heat exchangers enhanced by double perforated louvered strip insert. Powder Technology, 367. pp. 877-888. ISSN 0032-5910

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Official URL: https://doi.org/10.1016/j.powtec.2020.04.043

Abstract

In this study, turbulent flow characteristics of CuO-water nanofluid through heat exchanger pipe enhanced with louvered strips are numerically investigated. Nanoparticles volume fraction (ϕ) varied from 0 to 2%. The louvered strips are mounted in single and double geometries. The slant angle (θ) and the Reynolds number (Re) are within 15° − 25° and between 5000 and 14,000, respectively. (RNG) k − ϵ model is employed based on the finite volume technique. The results illustrated that strong flow disturbance between the wall and the louvered strip is the main reason for turbulent kinetic energy increment. Besides, the nanoparticles improve the thermophysical properties of the working fluid, which results in better heat transfer. The Nu number increases 15.6% by using nanofluid instead of water at Re = 14000. The highest thermal enhancement parameter of 1.99 is obtained at Re = 14000 by using double perforated louvered strip with θ = 25°. The recirculating flow inside the holes can significantly improve the thermal performance.

Item Type: Article
Uncontrolled Keywords: Nanoparticles, Louvered strips, Turbulent flow, Heat transfer, CFD
Subjects: H700 Production and Manufacturing Engineering
H800 Chemical, Process and Energy Engineering
H900 Others in Engineering
J500 Materials Technology not otherwise specified
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: John Coen
Date Deposited: 22 May 2020 13:40
Last Modified: 22 May 2020 15:15
URI: http://nrl.northumbria.ac.uk/id/eprint/43234

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