Study of three‐dimensional natural convection and entropy generation in an inclined solar collector equipped with partitions

Yejjer, Olfa; Kolsi, Lioua; Aich, Walid; Al‐Rashed, Abdullah A.A.A.; Borjini, Mohamed Naceur; Aïssia, Habib Ben

doi:10.1002/htj.21275

Cited by 9 publications

(4 citation statements)

References 32 publications

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“…[49][50][51][52][53][54][55][56][57][58] can be used to cite the majority of recent related works in order to keep things brief. A few recent publications that touch on the subject of the study at hand have been covered in [59][60][61][62][63][64][65][66][67][68].…”

Section: List Of Symbolsmentioning

confidence: 99%

MHD Casson Nanofluid Flow over Convectively Heated Non-Linear via a Porous Medium: Fractional Order Analysis Based on an Extending Surface with Suction/Injection

Abdelhafez,

Abd-Alla,

Abo-Dahab

et al. 2024

Preprint

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An attempt is made to explain the thermophysical properties of the viscoelastic fluid flow generated by a stretched, nonlinearized surface. Here, the Casson fluid model characterizes viscoelasticity, which is then rheologically stated in the fractional momentum equation. The characteristics of Casson fluid flow are carefully examined in a transversally magnetized field with the option of suction or injection to the surface. Porousness is another attribute of flow medium. To illustrate the change in heat transmission inside the flow domain, convective heating is applied to the surface. To find out how well thermophoretic forces and Brownian motion affect particle diffusion, nanosized particles are suspended in the Cassin fluid. Mass transport measurements are also taken into account for generative chemical reactions. Flow-narrating fractional differential equations for a problem are first obtained in fractional differential equations and then, through the use of similarity, transformed into an fractional ordinary differential coupled system. Through graphical structures, variations in flow-associated distributions against relevant parameters are revealed. Additionally computed are wall drag, heat, and mass fluxes. By comparing the computed results to previously released data in a limited sense, the computing results' credibility is verified.

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Section: List Of Symbolsmentioning

confidence: 99%

MHD Casson Nanofluid Flow over Convectively Heated Non-Linear via a Porous Medium: Fractional Order Analysis Based on an Extending Surface with Suction/Injection

Abdelhafez,

Abd-Alla,

Abo-Dahab

et al. 2024

Preprint

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“…Furthermore, using asymmetric opening positions improves the natural venti-lation and facilitates buoyancy induced upward cross air-flow (low-level supply and upper-level extraction) inside the greenhouse. In the study of Yejjer et al [16] concerning three-dimensional natural convection and entropy generation in an inclined solar collector equipped with partitions, results are reported in terms of isosurfaces of temperature, isotherms, particles trajectories, velocity vector projection, average Nusselt number along the absorber plate and entropies generation contours. Aich et al [17] made a numerical analysis of natural convection in parismatic enclosure that looks like a monochapel greenhouse; he found that heat transfer increases with increasing Rayleigh number and decreases with increasing aspect ratio.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Natural Convection With Heated Tubes in Tunnel Greenhouse

Slatni

Djezzar

Messai³

2021

Journal of Thermal Engineering

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In this research, a numerical study was carried out on heat transfer by natural convection, in a closed tunnel greenhouse, in the range of the Rayleigh number (10 3 ≤Ra≤10 6 ). Were considered in the study, the number of heating tubes used (1≤Nt≤7), which were equidistant inside the greenhouse volume, when the bottom at an average temperature and cold Roof. The governing equations written in a bicylindrical coordinates were discretized using the finite volume method and vorticity-stream function formulation; the resulting algebraic equations were solved using successive over relaxation method (S.O.R). First, the effect of the Rayleigh number on heat transfer was examined for a fixed number of tubes as reference (Nt = 3) and the number of tubes was varied to investigate the influence on heat transfer in the greenhouse. Finally, the results obtained were summarized in the form of isotherms and streamlines, and for the average Nusselt number profile; in addition to the horizontal and vertical velocities and temperatures. However, in the reference case, for low Rayleigh numbers, the heat transfer is dominated by pure conduction.With the increase of the Rayleigh number and the number of tubes Nt, the natural convection becomes more dominant and the heat transfer increases, and in general the heat transfer increase with the increasing number of tubes.

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“…Meanwhile, Farhat et al [22] studied a flat plate collector to determine the optimum mass flow rate, the collector surface area, and the thermal efficiency. Moreover, entropy analysis of a solar collector can be found in [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Simulation for 3D MHD Rotating Hybrid NanoFluid Flow Between Parallel Plates in Parabolic Trough Solar Collector: A Numerical Study

Shahzad

Jamshed

Sajid

et al. 2021

J. Engin. Thermophys.

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Solar thermal collectors disperse and collect the solar radiation with its further conversion into thermal energy through solar thermal concentrating systems, which frequently use nanofluids as a heat transporter. The present research makes emphasis on the analysis of the magnetohydrodynamics (MHD) of flow of hybrid nanofluid (HNF) and conventional nanofluid (CNF) between two rotating plates. The flow is induced by an exponentially stretching sheet in a parabolic trough solar collector (PTSC). Owing to a similarity transformation, partial differential equations with boundary constraints were converted to a simpler case of nonlinear ordinary-differential formulas. The Keller-box process is introduced for finding an approximate solution of the ordinary reduced differential equations. Hybrid nanofluid, which consists of two kinds of nanoparticles, copper (Cu) and aluminium (Al) with Newtonian water (H 2 O) base fluid, is considered. The key idea of this article is to scrutinize the impact of variation of significant parameters on the velocity, temperature, and heat transport rate for Al-H 2 O nanofluid and Cu-Al/H 2 O hybrid nanofluid. The results evidence that the hybrid nanofluid (Cu-Al/H 2 O) has a lower friction factor and higher heat transmission rate as compared with the conventional nanofluid (Al-H 2 O). Furthermore, the rotation parameter decelerates the heat transport rate. To visualize the fluid flow, streamlines are drawn for different values of the suction/injection parameter.

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Study of three‐dimensional natural convection and entropy generation in an inclined solar collector equipped with partitions

Cited by 9 publications

References 32 publications

MHD Casson Nanofluid Flow over Convectively Heated Non-Linear via a Porous Medium: Fractional Order Analysis Based on an Extending Surface with Suction/Injection

MHD Casson Nanofluid Flow over Convectively Heated Non-Linear via a Porous Medium: Fractional Order Analysis Based on an Extending Surface with Suction/Injection

Numerical Investigation of Natural Convection With Heated Tubes in Tunnel Greenhouse

Heat Transfer Simulation for 3D MHD Rotating Hybrid NanoFluid Flow Between Parallel Plates in Parabolic Trough Solar Collector: A Numerical Study

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