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MHD heat transfer and entropy production of an Al 2 O 3 ‐water nanofluid in a horizontal cylinder
Author(s) -
Belahmadi Essma,
Bessaїh Rachid
Publication year - 2021
Publication title -
heat transfer
Language(s) - English
Resource type - Journals
eISSN - 2688-4542
pISSN - 2688-4534
DOI - 10.1002/htj.22108
Subject(s) - nanofluid , heat transfer , entropy production , entropy (arrow of time) , thermodynamics , magnetic field , convective heat transfer , convection , materials science , hartmann number , magnetohydrodynamics , mechanics , physics , magnetohydrodynamic drive , quantum mechanics
Abstract This paper deals with the effect of magnetic fields ( B r , B θ , B z ) applied in r ‐, θ‐, z ‐directions, respectively, on entropy production and heat transfer and in a horizontal cylinder filled with an Al 2 O 3 ‐water nanofluid. The results are verified using literature data. For different Richardson, Ri , and Hartmann numbers, Ha , the nanoparticles (NP) ϕ, and magnetic field orientation combined effect provide a better understanding of heat transfer and entropy optimization. The results indicate that entropy production and heat transfer and rates depend on magnetic field intensity and direction. Also, increasing Ri and NP increases entropy generation and heat transfer. Finally, applying a radial magnetic field promotes a better convective heat transfer and minimizes entropy production.