Lattice Boltzmann Simulation of Combined Effects of Radiation and Mixed Convection in a Lid-Driven Cavity with Cooling and Heating by Sinusoidal Temperature Profiles on One Side

Dahani, Youssef; Hasnaoui, M.; Amahmid, A.; Mansouri, A. El; Hasnaoui, Safae

doi:10.1080/01457632.2018.1558009

Cited by 13 publications

(4 citation statements)

References 30 publications

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“…Wu et al (2016) investigate the effect of aspect ratio on the non-Darcian natural convective heat transfer and heat generating in a square porous enclosure with sinusoidally thermally active sidewall under local thermal non-equilibrium state. The effect of sinusoidal spatial variation of temperature on the coupling between mixed convection and surface radiation in a square cavity was investigated numerically by Dahani et al (2019). They found that the contribution of radiation to the total heat transfer is not negligible even at low Richardson numbers.…”

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confidence: 99%

Thermosolutal natural convection in a partly porous cavity with sinusoidal wall heating and cooling

Omara

Touiker

Bourouis

2021

HFF

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Purpose This paper aims to consider numerical analysis of laminar double-diffusive natural convection inside a non-homogeneous closed medium composed of a saturated porous matrix and a clear binary fluid under spatial sinusoidal heating/cooling on one side wall and uniform salting. Design/methodology/approach The domain of interest is a partially square porous enclosure with sinusoidal wall heating and cooling. The fluid flow, heat and mass transfer dimensionless governing equations associated with the corresponding boundary conditions are discretized using the finite volume method. The resulting algebraic equations are solved by an in-house FORTRAN code and the SIMPLE algorithm to handle the non-linear character of conservation equations. The validity of the in-house FORTRAN code is checked by comparing the current results with previously published experimental and numerical works. The effect of the porous layer thickness, the spatial frequency of heating and cooling, the Darcy number, the Rayleigh number and the porous to fluid thermal conductivity ratio is analyzed. Findings The results demonstrate that for high values of the spatial frequency of heating and cooling (f = 7), temperature contours show periodic variations with positive and negative values providing higher temperature gradient near the thermally active wall. In this case, the temperature variation is mainly in the porous layer, while the temperature of the clear fluid region is practically the same as that imposed on the left vertical wall. This aspect can have a beneficial impact on thermal insulation. Besides, the porous to fluid thermal conductivity ratio, Rk, has practically no effect on Shhot wall, contrary to Nuinterface where a strong increase is observed as Rk is increased from 0.1 to 100, and much heat transfer from the hot wall to the clear fluid via the porous media is obtained. Practical implications The findings are useful for devices working on double-diffusive natural convection inside non-homogenous cavities. Originality/value The authors believe that the presented results are original and have not been published elsewhere.

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confidence: 99%

Thermosolutal natural convection in a partly porous cavity with sinusoidal wall heating and cooling

Omara

Touiker

Bourouis

2021

HFF

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“…Now, concerning the thermal boundary conditions on the horizontal adiabatic walls(bottom and top walls), the following expressions were used [7]:…”

Section: Lattice-boltzmann Methodsmentioning

confidence: 99%

Lattice Boltzmann Simulations of Coupled Mixed Convection and Radiation Effect in a Two-Sided Lid-Driven Enclosure

Dahani

Hasnaoui

Amahmid

et al. 2020

Jour. Atom. Mol. Conden. Matt. Nano Physics

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Using Lattice Boltzmann Method (LBM), the mixed convection and surface radiation effect in a two-sided lid-driven square cavity is studied numerically with air as a working fluid. The numerical code is validated against results available in the literature. The parameters governing the problem are the emissivity of the walls, the Reynolds number and the Richardson number that was varied through the Grashof number. The results obtained show significant effects of the Richardson number and surface radiation on the overall structure of the flow and heat transfer characteristics. The contribution of radiation component to the total Nusselt number outclasses that of convection for high emissive walls at some threshold value of Richardson number.

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“…Also, Farsani et al [5] analyzed the lid-driven rectangular cavity to simulate the flow analysis in the liquid-solid interface dynamics. Moreover, Dahani et al [6] have computed the sinusoidal temperature variation function on one side of the rectangular cavity with the combined effect of magnetic field and convection in the cavity. Selimefendigil and Oztop [7] also, examined the characteristics of modeling and optimization of flow of nanofluid in the trapezoidal cavity under the influence of magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of flow in trapezoidal enclosure having a heated inner circular cylinder containing Casson nanofluid

Hirpho

Ibrahim

2021

Heliyon

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In this article, simulation of the two-dimensional flow of natural convective transport in the partially heated lid-driven trapezoidal cavity was presented with finite element method using software called COMSOL Multiphysics®. Inside the cavity a stationary circular cylinder with a high temperature has been placed. The enclosure was filled with nanofluid. The flow is assumed to be two-dimensional and has been examined when the parallel sides of the cavity are adiabatic. The temperature on non-parallel sides is assumed to be cold. The top wall of the cavity moves with a velocity in the positive x-direction, and the considered fluid is a non-Newtonian Casson nanofluid. Computation has been done for the Rayleigh numbers and 10 6 , the Casson fluid parameter 0.1 0.5 , and 1, and the nanofluid solid volume fraction 0 and 0.15. Prandtl number is kept fixed at 6.2 throughout the calculations. Isotherms and streamlines were sketched to visualize the distribution of temperature and flow field in the cavity. The impacts of governing parameters such as Casson parameter, solid volume fraction, Rayleigh number on heat transfer, and flow field were numerically computed and analyzed. Average Nusselt number also exhibited in a tabular and graphical form to signify the rate of heat transfer in the cavity. It was found that the centers of the two larger circulations were observed to migrate towards the top wall of the cavity as the Rayleigh number increased. Furthermore, heat transport was enhanced as the concentration of nanoparticles increased.

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Lattice Boltzmann Simulation of Combined Effects of Radiation and Mixed Convection in a Lid-Driven Cavity with Cooling and Heating by Sinusoidal Temperature Profiles on One Side

Cited by 13 publications

References 30 publications

Thermosolutal natural convection in a partly porous cavity with sinusoidal wall heating and cooling

Thermosolutal natural convection in a partly porous cavity with sinusoidal wall heating and cooling

Lattice Boltzmann Simulations of Coupled Mixed Convection and Radiation Effect in a Two-Sided Lid-Driven Enclosure

Dynamics of flow in trapezoidal enclosure having a heated inner circular cylinder containing Casson nanofluid

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