Effect of inclined wavy surface on heat transfer inside a rectangular cavity: Solar applications

Agrouaz, Y.; Bouhal, T.; Jamil, A.; Msaad, Abdelouahad Ait; Kousksou, T.; Mahdaoui, Mustapha; Rhafiki, T. El

doi:10.1109/irsec.2015.7455006

Cited by 4 publications

(5 citation statements)

References 17 publications

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“…According to numerical investigations of stationary Poiseuille flow and unsteady Womersley flow, the modified LBGK model has a second-order spatial convergence rate, and the compressibility. Additionally, they performed some simulations of natural convection in a square cavity to evaluate the stability of the present models, and they found that the outcomes are consistent with the literature even when Rayleigh is extremely high (Ra=10 12 ).…”

Section: Introductionsupporting

confidence: 78%

“…While the heat transfer rate is larger in the crests, the velocity values are decreased by the higher amplitude wave length ratio. In a 2D numerical simulation by Agrouaz et al [12], they took the cavity's inclination with a wavy bottom wall and the Rayleigh number into consideration. The heat transfer rate has been increased with the variation of the inclination angle of the cavity for a constant value of Rayleigh number.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigations of Natural Convection in a Cubical Enclosure with Various Protuberance Shapes

Bouguerne,

Rahal,

Brima

et al. 2024

IJHT

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Heat transfer by convection is widely used in many engineering applications such as in heat exchangers, combustion devices or gas processing. In Buildings, the use of rough surfaces allows enhancing heat transfer rates. Practically, in this study, a rough surface is obtained by using protuberances on the vertical left wall. In this perspective, the originality of this research is to study the influence of the protuberance geometric shapes on the heat transfer using 2D numerical simulations as a tool investigation. The homotopic transformation is used to reach a flat plate. The system of equations with the boundary conditions is solved using the finite volume method. A simple algorithm is chosen for the integration of algebraic equations. The governing equations are figured out using ANSYS FLUENT commercial software with SIMPLE algorithm in order to solve pressure-velocity coupling. The numerical simulations have been performed for different shapes of the protuberances (battlement, triangular and sinusoidal). The boundary conditions are based on a uniform heat flux applied to the vertical wall. On the other hand, the horizontal walls are subject to the adiabatic condition. It can be noticed that the effect of the wavy geometry induces a noticeable improvement of the heat transfer rate compared to an enclosure without protuberances. It can also conclude that the wavy configuration exhibits a Nusselt average slightly higher than that of the square cavity, particularly the triangular configuration, by approximately 20%.

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Section: Introductionsupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Numerical Investigations of Natural Convection in a Cubical Enclosure with Various Protuberance Shapes

Bouguerne,

Rahal,

Brima

et al. 2024

IJHT

View full text Add to dashboard Cite

show abstract

“…Moreover, roughed walls may be applied to cool nuclear and electrical constituents when the surface temperature fluctuation is available. Walls are deliberately roughened from time to time for improving temperature transport 11,12 …”

Section: Introductionmentioning

confidence: 99%

“…Walls are deliberately roughened from time to time for improving temperature transport. 11,12 Numerous investigations have been conducted on magnetohydrodynamic (MHD) lid-driven convective stream for allowing unlike nanofluid for dissimilar physical conditions. Report of these studies can be obtained from refs.…”

mentioning

confidence: 99%

Performance analysis of hybrid/single nanofluids on augmentation of heat transport in lid‐driven undulated cavity

et al. 2020

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This numerical study reveals the heat transfer performance of hybrid/single nanofluids inside a liddriven sinusoidal trapezoidal-shaped enclosure. The right and left inclined surfaces of the trapezium have been considered as insulated, whereas the bottom sinusoidal wavy and the flat top surfaces of the enclosure as hot and cold, respectively. The governing partial differential equations of fluid's velocity and temperature have been resolved by applying the finite element method. The implications of Prandtl number (4.2-6.2), Richardson number (0.1-10.0), undulation number (0-3), nanoparticles volume fraction (0%-3%), and nanofluid/base fluid (water, water-copper (Cu), water-Cu-carbon nanotube, water-Cu-copper oxide (CuO), water-Cu-TiO 2 , and water-Cu-Al 2 O 3) on the velocity and temperature profiles have been studied. Simulated findings have been represented by means of streamlines, isothermal lines, and average Nusselt number of above-mentioned hybrid nanofluids for varying the governing parameters. The comparison of heat transfer rates using hybrid nanofluids and pure water has been also shown. The heat transfer rate is increased about 15% for varying Richardson number from 0.1 to 10.0. Blending of two nanoparticles suspension in base fluid has a higher heat transfer rate-approximately 5% than a mononanoparticle. Moreover, a higher average Nusselt number is obtained by 14.7% using the wavy surface than the flat surface of the enclosure. Thus, this study showed that applying hybrid nanofluid may be beneficial to obtain expected thermal performance.

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“…Researchers Nasrin (2011), Gangawane and Manikandan (2017) were interested in heat transfer by mixed convection inside lid driven cavities of different shapes as it has huge applications in environment and industry. Al-Amiri (2007), Agrouaz et al (2015) described that flow and heat transfer from irregular surfaces are often encountered in many engineering applications to enhance heat transfer such as micro-electronic devices, flatplate solar collectors and flat-plate condensers in refrigerators, flows in the earth's crust, underground cable systems, electric machinery, cooling system of micro-electronic devices, etc. In addition, roughened surfaces could be used in the cooling of electrical and nuclear components where the wall heat flux is known.…”

Section: Introductionmentioning

confidence: 99%

Mixed convective hybrid nanofluid flow in lid-driven undulated cavity: effect of MHD and Joule heating

Zahan

Nasrin

Alim

2019

J. nav. arch. mar. engg.

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A numerical analysis has been conducted to show the effects of magnetohydrodynamic (MHD) and Joule heating on heat transfer phenomenon in a lid driven triangular cavity. The heat transfer fluid (HTF) has been considered as water based hybrid nanofluid composed of equal quantities of Cu and TiO2 nanoparticles. The bottom wall of the cavity is undulated in sinusoidal pattern and cooled isothermally. The left vertical wall of the cavity is heated while the inclined side is insulated. The two dimensional governing partial differential equations of heat transfer and fluid flow with appropriate boundary conditions have been solved by using Galerkin's finite element method built in COMSOL Multyphysics. The effects of Hartmann number, Joule heating, number of undulation and Richardson number on the flow structure and heat transfer characteristics have been studied in details. The values of Prandtl number and solid volume fraction of hybrid nanoparticles have been considered as fixed. Also, the code validation has been shown. The numerical results have been presented in terms of streamlines, isotherms and average Nusselt number of the hybrid nanofluid for different values of governing parameters. The comparison of heat transfer rate by using hybrid nanofluid, Cu-water nanofluid, TiO2 -water nanofluid and clear water has been also shown. Increasing wave number from 0 to 3 enhances the heat transfer rate by 16.89%. The enhanced rate of mean Nusselt number for hybrid nanofluid is found as 4.11% compared to base fluid.

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Effect of inclined wavy surface on heat transfer inside a rectangular cavity: Solar applications

Cited by 4 publications

References 17 publications

Numerical Investigations of Natural Convection in a Cubical Enclosure with Various Protuberance Shapes

Numerical Investigations of Natural Convection in a Cubical Enclosure with Various Protuberance Shapes

Performance analysis of hybrid/single nanofluids on augmentation of heat transport in lid‐driven undulated cavity

Mixed convective hybrid nanofluid flow in lid-driven undulated cavity: effect of MHD and Joule heating

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