Two-phase computation of free convection and entropy generation inside an enclosure filled by a hybrid<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:mrow><mml:mi>A</mml:mi><mml:msub><mml:mi>l</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.svg"><mml:mrow><mml:mi mathvariant="italic">Ti</mml:mi><mml:msub><mml:mi>O</mml:mi><mml:mn>2</mml:mn>

Boulahia, Zoubair; Boulahia, Chaimae; Sehaqui, Rachid

doi:10.1016/j.matpr.2020.05.523

Cited by 12 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, for high Ra values and whatever Ha values, increasing the conductivity ratio led to an augmentation in the heat transfer rate and a deterioration in entropy generation. Boulahia et al (2020) tried to examine free convection and entropy production in a square cavity filled with hybrid nanofluid (Al 2 O 3 -TiO 2 -Cu/ water) and containing a corrugated heat source. Results showed that entropy generation was dominated by the heat and mass irreversibility at the low Rayleigh number, while it was dominated by the fluid friction irreversibility at the high Rayleigh number.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance analysis of hybrid nanofluid natural convection in a square cavity containing an elliptical obstacle under variable magnetic field

Belhaj

Ben-Beya

2021

HFF

View full text Add to dashboard Cite

Purpose This study aims to analyze entropy generation and magnetohydrodynamic (MHD) natural convection of hybrid nanofluid in a square cavity, with a heated elliptical block placed at the center, in presence of a periodic-variable magnetic field. Design/methodology/approach In this paper, simulations were performed with a FORTRAN home code. The numerical methodology used to solve Navier–Stokes, energy and entropy generation equations with corresponding boundary conditions, is essentially based on the finite volume method and full multigrid acceleration. Findings The cavity is filled with Ag–Tio2/Water hybrid nanofluid. The main objective of this investigation is to predict the effects of body’s size (6 cases), type of applied magnetic field (variable or uniform), the non-dimensional period number of the variable magnetic field (VMF) (0.2 ≤ Λ ≤ 0.8), the inclination angle of the VMF (0 ≤ χ ≤ 90), Rayleigh number (5 × 103 ≤ Ra ≥ 105) and Hartmann number (5 ≤ Ha ≥ 100) on thermal performance, heat transfer rate, entropy generation and flow patterns. Originality/value To the authors’ best knowledge, this paper is the first numerical investigation deals with the entropy generation and natural convection of hybrid nanofluid in a two-dimensional cavity, with specific thermal boundary conditions, containing an elliptical block under periodic-variable magnetic field. Different combinations between flow-governing parameters were made to find optimal thermal performance.

show abstract

Section: Introductionmentioning

confidence: 99%

Thermal performance analysis of hybrid nanofluid natural convection in a square cavity containing an elliptical obstacle under variable magnetic field

Belhaj

Ben-Beya

2021

HFF

View full text Add to dashboard Cite

show abstract

“…Kumar and Sarkar [33] investigated the transfer of heat and drop of pressure of heat sink experimentally and present results numerically. Boulahia et al [34] analyzed the entropy production ina convective boundary flow of the hybrid nanofluid inside a closed figure, wavy-shaped heat source placed at the center. Urmi et al [35] explore experimentally the viscosity and thermal conductivity of hybridnaofluid TiO 2 -A l 2 O 3 , and ethylene glycol is used as the base fluid.…”

Section: Introductionmentioning

confidence: 99%

MHD Analysis of Couple Stress Hybrid Nanofluid Free Stream over a Spinning Darcy-Forchheimer Porous Disc under the Effect of Thermal Radiation

Zubair

Jawad

Bonyah³

et al. 2021

Journal of Applied Mathematics

View full text Add to dashboard Cite

This article develops the semianalytical analysis of couple stress hybrid nanofluid free stream past a rotating disc by applying the magnetic flux effects and radiation of thermal energy. The analysis of such kind of mixed convective flow is most important due to numerous industrial applications such as electronic devices, atomic reactors, central solar energy equipment, and heat transferring devices. The impact of variable permeability is also considered in the study. The permeability of the disc obeys the Darcy-Forchheimer model. The hybrid nanofluid is composed of water, titanium dioxide, and aluminum oxide. The set of governing equations in the PDE form are transformed to couple ODEs by applying similarity transformations. The ODE set are solved by applying the technique of HAM. The graphs of impacts of numerous physical parameters over momentum, energy, and concentration profiles are drawn in computer-based application Mathematica 11.0.1. In the sundry physical parameters, the porosity parameter, Reynolds number, inertial parameter, Prandtl number, Schmidt number, couple stress, and quotient of rotational momentum to elongating rate are included. During the analysis, it is found that the momentum profile of the couple stress hybrid nanofluid enhances with local inertial parameter, couple stress parameter, porosity parameter, and Reynolds number but declines for the growth in Hartmann number. Heat transfer rate enhances for radiation parameter but decreases in variable for temperature, thermal stratification parameter, thermophoresis parameter, and Brownian parameter.

show abstract

Thermal and energy management prospects of γ-AlOOH hybrid nanofluids for the application of sustainable heat exchanger systems

Anitha

Safaei

Rajeswari³

et al. 2021

J Therm Anal Calorim

View full text Add to dashboard Cite

Two-phase computation of free convection and entropy generation inside an enclosure filled by a hybridAl2O3-TiO2

Cited by 12 publications

References 25 publications

Thermal performance analysis of hybrid nanofluid natural convection in a square cavity containing an elliptical obstacle under variable magnetic field

Thermal performance analysis of hybrid nanofluid natural convection in a square cavity containing an elliptical obstacle under variable magnetic field

MHD Analysis of Couple Stress Hybrid Nanofluid Free Stream over a Spinning Darcy-Forchheimer Porous Disc under the Effect of Thermal Radiation

Thermal and energy management prospects of γ-AlOOH hybrid nanofluids for the application of sustainable heat exchanger systems

Contact Info

Product

Resources

About