Conjugate natural heat transfer scrutiny in differentially heated cavity partitioned with a conducting solid using the lattice Boltzmann method

Ferhi, Mokhtar; Djebali, Ridha; Abboudi, Saïd; Kharroubi, H.

doi:10.1007/s10973-019-08276-8

Cited by 33 publications

(4 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This phenomenon indicates that the convection effect increases in this region. These results are similar to the results performed by Ferhi et al (2019) in a previous study for the case of a differentially heated divided cavity filled with air. 7.4.3 Entropy generation.…”

Section: Appraising Conjugate Heat Transfersupporting

confidence: 91%

See 1 more Smart Citation

Appraising conjugate heat transfer, heatlines visualization and entropy generation of Ag-MgO/H₂O hybrid nanofluid in a partitioned medium

Ferhi

Djebali

2020

HFF

View full text Add to dashboard Cite

Purpose This paper aims to perform the lattice Boltzmann simulation of conjugate natural convection heat transfer, heat flow visualization via heatlines approach and entropy generation in a partitioned medium filled with Ag-MgO (15-85%)/water. Design/methodology/approach The lattice Boltzmann method (LBM) is used to predict the dynamic and thermal behaviors. Experimental correlations for dynamic viscosity and thermal conductivity versus solid volume fraction are used. The study is conducted for the ranges of Rayleigh number 103 ≤ Ra ≤ 106, the partitioner thickness 0.01 ≤ δ ≤ 0.9, its position 0.15 ≤ Xs ≤ 0.85 and the hybrid nano-suspensions volume fraction 0% ≤ ϕ ≤ 2%. Findings The effects of varying of controlling parameters on the convective flow patterns, temperature contours, heat transfers, the heatlines and the entropy generation are presented. It has been found that the maximum rate of heat transfer enhancement occurs for low Ra numbers (103) and is close to 13.52%. The solid thickness d and its horizontal position Xs have a substantial influence on the heat transfer rate, flow structure, heatline, total entropy generation and Bejan number. Besides, the maximum heat transfer is detected for high Ra and δ ≈ 1 and the percentage of augmentation is equal to 65.55% for ϕ = 2%. According to the horizontal position, the heat transfer remains invariant for Ra = 103 and takes a maximum value near the active walls for Ra ≥ 104. The total entropy generation increases with Ra and decreases with ϕ for Ra = 106. The increase of ϕ from 0 to 2% leads to a reduction in close to 40.76%. For this value of Ra, the entropy is the maximum for δ = 0.4 and Xs = 0.35 and Xs = 0.65%. Moreover, as the Ra increases the Bejan number undergoes a decrease. The Bejan number is the maximum for Ra = 103 independently to δ and Xs. The superior thermal performance manifests at low Ra and high value of δ independently to the positions of the conducting body. Originality/value The originality of this paper is to analyze the hybrid nano-additive effects on the two-dimensional conjugate natural convection in a partitioned medium using the LBM. The experimental correlations used for the effective thermal conductivity and dynamic viscosity give credibility to our study. Different approaches such as heatlines and entropy generation are used.

show abstract

Section: Appraising Conjugate Heat Transfersupporting

confidence: 91%

“…The heat transfer is the maximum when the wall partition is located near the active walls. This observed effect of the partition position was also reported in the case of a partitioned differentially heated cavity performed by Ferhi et al (2019).…”

Section: Appraising Conjugate Heat Transfersupporting

confidence: 77%

Appraising conjugate heat transfer, heatlines visualization and entropy generation of Ag-MgO/H₂O hybrid nanofluid in a partitioned medium

Ferhi

Djebali

2020

HFF

View full text Add to dashboard Cite

show abstract

“…Mainly, the scholars have concentrated on the mechanism of nanofluids' transfer of heat. [1][2][3][4][5] Pordanjani et al 6 evaluated the free convection of an alumina-water nanofluid in an enclosure. They assessed the influence of the magnetic flux on the transfer of heat rate, which results in a higher Ha.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, it may also be helpful in the field of cooling solar systems utilizing phase‐change materials, separation of the closed medium, and sustainable power source‐related applications. Mainly, the scholars have concentrated on the mechanism of nanofluids' transfer of heat 1‐5 …”

Section: Introductionmentioning

confidence: 99%

MHD conjugate heat transfer and entropy generation analysis of MWCNT/water nanofluid in a partially heated divided medium

et al. 2020

View full text Add to dashboard Cite

The aim of this article is to conduct the lattice Boltzmann simulation of the magnetohydrodynamic (MHD) natural conjugate heat transfer in an apportioned cavity loaded with a multiwalled carbon nanotube/water nanofluid. The divided cavity is, to some extent, heated and cooled at the upright walls, whereas the horizontal walls are adiabatic. The nanofluid properties are evaluated on the basis of experimental correlations. The parameters ranges in the study are as follows: nanoparticles' volume fraction (%): 0 ≤ ϕ ≤ 0.5, temperature (°C): T = 27, Rayleigh number (Ra): 10 3 ≤ Ra ≤ 10 5 , Hartmann number (Ha): 0 ≤ Ha ≤ 90, and the magnetic field inclination angle (γ): 0 ≤ γ ≤ π/2. The current outcomes are observed to be in great concurrence with the numerical results introduced in the literature. The impacts of the aforesaid parameters on local and average heat transfer, entropy generation, and Bejan number (Be) are explored and discussed. Indeed, the transfer of heat increases linearly with ϕ for a low Ra. As Ra increases, the average Nusselt number decreases for a high value of ϕ. The increase of nanoparticles' volume fraction leads to a reduction in the entropy generation and an increase in the Bejan number for a high Ra, but at low Ra, these functions remain

show abstract

Numerical Investigation of Natural Convection Combined with Surface Radiation in a Divided Cavity Containing Air and Water

Charqui

Moutaouakil

Boukendil

et al. 2022

Intelligent Computing &Amp; Optimization

View full text Add to dashboard Cite

Conjugate natural heat transfer scrutiny in differentially heated cavity partitioned with a conducting solid using the lattice Boltzmann method

Cited by 33 publications

References 51 publications

Appraising conjugate heat transfer, heatlines visualization and entropy generation of Ag-MgO/H₂O hybrid nanofluid in a partitioned medium

Appraising conjugate heat transfer, heatlines visualization and entropy generation of Ag-MgO/H₂O hybrid nanofluid in a partitioned medium

MHD conjugate heat transfer and entropy generation analysis of MWCNT/water nanofluid in a partially heated divided medium

Numerical Investigation of Natural Convection Combined with Surface Radiation in a Divided Cavity Containing Air and Water

Contact Info

Product

Resources

About

Conjugate natural heat transfer scrutiny in differentially heated cavity partitioned with a conducting solid using the lattice Boltzmann method

Cited by 33 publications

References 51 publications

Appraising conjugate heat transfer, heatlines visualization and entropy generation of Ag-MgO/H2O hybrid nanofluid in a partitioned medium

Appraising conjugate heat transfer, heatlines visualization and entropy generation of Ag-MgO/H2O hybrid nanofluid in a partitioned medium

MHD conjugate heat transfer and entropy generation analysis of MWCNT/water nanofluid in a partially heated divided medium

Numerical Investigation of Natural Convection Combined with Surface Radiation in a Divided Cavity Containing Air and Water

Contact Info

Product

Resources

About

Appraising conjugate heat transfer, heatlines visualization and entropy generation of Ag-MgO/H₂O hybrid nanofluid in a partitioned medium

Appraising conjugate heat transfer, heatlines visualization and entropy generation of Ag-MgO/H₂O hybrid nanofluid in a partitioned medium