Numerical Investigation of Natural Convection in Air Filled Cubical Enclosure with Hot Wavy Surface and Partial Partitions

Zemani, Farah; Sabeur-Bendehina, Amina; Boussoufi, Mustapha

doi:10.1016/j.procs.2014.05.469

Cited by 11 publications

(5 citation statements)

References 21 publications

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“…Natural convection flow and heat transfer characteristics in a rectangular cavities have received an important attention in the past decades. This importance due to its thermal performances in several applications such as cooling of electronic devices, food processing, drying technologies, solar collectors, energy storage systems, cooling technologies [1][2]. In a cavity, when the two vertical walls are differentially heated and the top and bottom walls are maintained under adiabatic conditions.…”

Section: Introductionmentioning

confidence: 99%

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

Agrouaz¹,

Bouhal²,

Jamil³

et al. 2015

2015 3rd International Renewable and Sustainable Energy Conference (IRSEC)

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In this present work a steady-state natural convection was numerically simulated in an inclined rectangular cavity with a sinusoidal bottom wavy wall. The vertical walls are insulated while the bottom surface maintained to higher temperature than the top surface. In this numerical simulation, Rayleigh number (10 3 , 10 6 and 6x10 6) and inclination angle (30°, 60° and 90°) were chosen in order to analyze the effect of these parameters on the heat transfer and the flow fields in two dimensional(2-D) enclosure filled in air (Pr=0.71). It is found that the same Rayleigh number,the heat transfer is influenced by the inclination angle. In other words the increase of inclination angle leads to an increase in the heat transfer inside the rectangular cavity.

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Section: Introductionmentioning

confidence: 99%

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

Agrouaz¹,

Bouhal²,

Jamil³

et al. 2015

2015 3rd International Renewable and Sustainable Energy Conference (IRSEC)

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“…Also, laminar natural convection inside air-filled rectangular enclosures, heated from below and cooled from above, with the lower portions of both sidewalls maintained at the temperature of the bottom wall, and the remaining upper portions of the sidewalls maintained at the temperature of the top wall, is studied numerically Caronna et al [7]. While a natural convection in cubical enclosure with hot surface geometry and partial partitions has been analyzed by Zemani et al [8]. The geometry is a cube with a wavy hot surface (three undulations) and three partitions.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Natural Convective Heat Transfer in an Air Filled Square Cavity Heated from Below and Symmetrically Cooled from the Sides with a Partition in the Hot Wall

Zemani-Kaci¹,

Sabeur-Bendhina²

2023

Fluid Dynamics &Amp; Materials Processing

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A two-dimensional numerical study of laminar natural convection in a square enclosure filled with air with a wall partially heated on the bottom is presented. The heat source is located on the lower wall with different heated widths varied from 20 to 80% (ε = 0.2-0.8) of the total width of the lower wall and different heights h = H/4 and H/2 of the partition. The effect of the partition height on the main system dynamics is investigated through solution of the two-dimensional Navier-Stokes equations and the energy equation by means of a finite volume method based on the SIMPLE algorithm. The influence of the Rayleigh number (Ra = 10 3 to 10 6 ) and the hot wall length is also examined. It is shown that the average Nusselt number grows when ε increases and when h decreases. For a given value of ε and h, the average Nusselt number increases as Ra increases. It is concluded that the partition height causes a decrease in the average Nusselt number.

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“…The flow field and heat transfer increase when the value of Darcy number is increased. (Zemani et al, 2014) have studied the effect of Partial Partitions on natural convection in air filled cubical enclosure with hot wavy surface, the geometry is a cube with wavy hot surface (three undulations) and three partitions the study showed that these partitions caused decrease of up 40% in the heat transfer with respect to the case at the same Rayleigh number. Also the increase of the high of partitions causes a decrease in the average Nusselt number.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Natural Convection in the Air Gap of a Vertical Flat Plat Thermal Solar Collector with Partitions Attached to Its Glazing

Laaraba

Khechekhouche²

2018

Indonesian J. Sci. Technol

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Heat transfer in the air gap of a vertical flat plat thermal solar collector containing partitions attached to its glazing has been studied numerically. The absorber and the glazing are kept at constant and different temperatures, while the vertical walls (insulation) were kept adiabatically. A conjugate formulation was used for mathematical formulation of the problem and a computer program based on the control volume approach and the simpler algorithm was used. The main aim of the current paper is to study numerically the effects of number of fins and their length on the air pattern and heat transfer. Experimental results showed that interesting phenomena happened, especially in the heat transfer process. It was observed that the heat transfer rate through the air gap is affected greatly and can be controlled by the number of attached fins to the glazing of the solar collector as well as the fin lengths, and the addition of partitions reduces the heat losses by convection by 60%. This study will brings good advantages for further uses, especially related to the heat transfer phenomena in the solar applications.

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Numerical Investigation of Natural Convection in Air Filled Cubical Enclosure with Hot Wavy Surface and Partial Partitions

Cited by 11 publications

References 21 publications

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

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

Numerical Study of Natural Convective Heat Transfer in an Air Filled Square Cavity Heated from Below and Symmetrically Cooled from the Sides with a Partition in the Hot Wall

Numerical Simulation of Natural Convection in the Air Gap of a Vertical Flat Plat Thermal Solar Collector with Partitions Attached to Its Glazing

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