Natural convection of nanoliquid from elliptic cylinder in wavy enclosure under the effect of uniform magnetic field: numerical investigation

In the current article, a three-dimensional numerical simulation is conducted to scrutinize the steady laminar natural convective flow and transfer of heat between a cold wavy porous enclosure and a hot elliptic cylinder. Alumina nanoparticles are dispersed in the water to enhance the heat exchange...

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Vydané v:European physical journal plus Ročník 136; číslo 4; s. 429
Hlavní autori: Mourad, Abed, Aissa, Abderrahmane, Mebarek-Oudina, Fateh, Al-Kouz, Weal, Sahnoun, Mohammed
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Berlin/Heidelberg Springer Berlin Heidelberg 01.04.2021
Springer Nature B.V
Predmet:
Applied and Technical Physics
Atomic
Complex Systems
Condensed Matter Physics
Convective flow
Cylinders
Darcy number
Enclosures
Entropy
Finite element method
Fluid flow
Free convection
Hartmann number
Heat exchange
Heat transfer
Inclination angle
Incompressible flow
Laminar flow
Magnetic fields
Mathematical and Computational Physics
Mathematical models
Molecular
Nanofluids
Nanoparticles
Nusselt number
Optical and Plasma Physics
Physics
Physics and Astronomy
Radiation
Regular Article
Theoretical
ISSN:2190-5444, 2190-5444
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Shrnutí:In the current article, a three-dimensional numerical simulation is conducted to scrutinize the steady laminar natural convective flow and transfer of heat between a cold wavy porous enclosure and a hot elliptic cylinder. Alumina nanoparticles are dispersed in the water to enhance the heat exchange process. The nanofluid flow is taken as laminar and incompressible, while the advection inertia effect in the porous layer is taken into account by adopting the Darcy–Forchheimer model. The problem is explained in the dimensionless form of the governing equations and solved by the finite element method. The influences of different governing parameters such as nanoparticles volume fraction ( ϕ ), angle of rotation ( α ), Darcy number (Da), Hartmann number (Ha), and Rayleigh number (Ra) on the fluid flow, temperature ( T ) filed and average Nusselt number are presented. The results exhibit that the heat transfer is enhanced when either of Ra, Da and ϕ is raised. The permeability increment achieved a 12.73% enhancement in the heat transfer rate. Also, when Ha is altered from 0 to 100, a reduction in values of the Nusselt number is given up to 22.22%. Furthermore, the optimal inclination angle for the convective process is α  = 45°.
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content type line 14
ISSN:2190-5444
2190-5444
DOI:10.1140/epjp/s13360-021-01432-w