Open AccessNumerical study of the flow of R1270‐based nanorefrigerants in a circular tube subject to uniform heat flux
Author(s) -
Zohud Mohammed,
Ouadha Ahmed,
Benzeguir Redouane
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2018.5132
Subject(s) - materials science , reynolds number , mechanics , heat transfer coefficient , heat transfer , convective heat transfer , heat flux , turbulence , tube (container) , nanofluid , thermodynamics , convection , computational fluid dynamics , work (physics) , fluent , heat transfer enhancement , composite material , physics
In this work, turbulent convective heat transfer of propylene (R1270)‐based nanorefrigerant in a circular tube with a uniform heat flux of 20 kW/m 2 is numerically investigated using different types of nanoparticles namely Al 2 O 3 , CuO, SiO 2 and ZnO with a volume concentration ranging from 0 to 5%. Computations have been carried out using the commercial CFD code Fluent for Reynolds number ranging from 20,000 to 100,000 and a nanoparticle diameter of 30 nm. Results in terms of the average convective heat transfer coefficients of both pure R1270 and R1270‐based nanorefrigerants have been compared successfully to values obtained using correlations from the literature. It is found that among nanorefrigerants studied, R1270/CuO performs the best, followed in order by R1270/Al 2 O 3 , R1270/ZnO and R1270/SiO 2 . It is also shown that the convective heat transfer coefficient is enhanced by increasing the Reynolds number and the nanoparticles volume concentration.