Numerical Investigation of Laminar Natural Convection in a Square Cavity With Wavy Wall and Horizontal Fin Attached to the Hot Wall

Kadari, Ahmed; Chemloul, N. Sad; Mekroussi, Said

doi:10.1115/1.4039081

Cited by 9 publications

(5 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results indicated an increase in the both local and the mean Nu numbers as the heat source is lengthened. Kadari et al (2018) found that the distribution of temperature is notably dependent on the size of the heat source, and both average and local Nu numbers increase when the local heat source is extended.…”

Section: Introductionmentioning

confidence: 99%

3D Numerical Simulation of Turbulent Mixed Convection in a Cubical Cavity Containing a Hot Block

Bouras¹,

Bouabdallah²,

Ghernaout³

et al. 2021

JAFM

View full text Add to dashboard Cite

The considerable quantities of heat transfer are dissipated during the operating electronic/electrical systems and have harmful effects on the operating time. So; to keep these systems in good working condition, the location of efficient mechanical cooling systems is essential. The heat transfer rate in an enclosure intensely depends on the combination of geometrical and physical parameters. For this purpose, a 3D Numerical simulation of turbulent mixed convection in a cubical cavity containing an internal heat source in its middle was carried out. The cavity has an inlet port at the lower left face area and an outlet port located in the upper right face area. The analyses are performed for air at ambient circumstances (Pr = 0.71) and the variation of interval for Richardson number (Ri) is chosen between 0.01 and 30 to investigate three situations: dominated forced convection, natural convection, and mixed convection for a fixed dimension of the enclosure in turbulent regimes (Gr = 10 9 ). The effects of the variation of Ri, the dimensionless time, and the dynamic parameters on the thermal flow and fluid flow phenomena are presented and discussed. The obtained results show an exchange between the forces of pressure and of buoyancy in the studied interval and a strong dependence between the geometrical parameters and the heat transfer rate, and then the correlations of the combination of the parameters were proposed.

show abstract

Section: Introductionmentioning

confidence: 99%

3D Numerical Simulation of Turbulent Mixed Convection in a Cubical Cavity Containing a Hot Block

Bouras¹,

Bouabdallah²,

Ghernaout³

et al. 2021

JAFM

View full text Add to dashboard Cite

show abstract

“…Kadari et al [19] looked into laminar natural convection in a square hollow with a horizontal fin attached to hot wall and a cold wavy wall. The influence of fin length, number of undulations, thermal conductivity ratio and fin position were also studied.…”

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

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%.

show abstract

“…Several investigations involving square cavities and enclosures of various sizes and aspect ratios have been carried out 20–37 …”

Section: Introductionmentioning

confidence: 99%

“…Several investigations involving square cavities and enclosures of various sizes and aspect ratios have been carried out. [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] Several researchers conducted a study on mixed convection inside cavities that were sinusoidal-heated, wherein Karim et al 38 conducted a numerical study of the unsteady mixed convection heat transfer properties of Ag-water nanofluids confined within a lid-driven square cavity with a sinusoidal heated bottom wall, according to the results the lower values of the parametric variation of sinusoidal even and odd frequency support enhanced heat transfer through convection and conduction.…”

Section: Introductionmentioning

confidence: 99%

A numerical investigation of the effect of sinusoidal temperature on mixed convection flow in a cavity filled with a nanofluid with moving vertical walls

et al. 2022

Self Cite

View full text Add to dashboard Cite

The aim of this study is to investigate numerically the effect of sinusoidal temperature on mixed convection flow in a cavity filled with nanofluid and moving vertical walls by using a new temperature function, where thermal heating takes the form of the sinusoidal temperature; and could be found in various natural processes and industries such as solar energy, and cooling of electronic components. The heating is concentrated in the center and then distributed to both ends at different values of Rayleigh numbers, Reynolds numbers, and volumetric fractions of nanoparticles ranging from 1.47 × 103 to 1.47 × 106, 1 to 100, and 0 to 0.1, respectively. The impact of nanoparticle size on thermal characteristics and hydrodynamics was considered and evaluated. From the results, the volume fraction concentration of nanoparticles affects the flow shape and thermal performance in the case of a constant Reynolds number. Moreover, the effect of nanoparticles decreases with the increase of the Reynolds number. Besides this, with increasing the volume percentage of nanoparticles, the rate of heat transmission increases. It is worth noting that the presence of nanoparticles results in height convective heat transfer coefficient. On the other hand, the thickness of thermal boundary layers decreases with increasing Rayleigh number. The current investigation found that the (sinusoidal) temperature change significantly affects heat transfer.

show abstract

Numerical Investigation of Laminar Natural Convection in a Square Cavity With Wavy Wall and Horizontal Fin Attached to the Hot Wall

Cited by 9 publications

References 34 publications

3D Numerical Simulation of Turbulent Mixed Convection in a Cubical Cavity Containing a Hot Block

3D Numerical Simulation of Turbulent Mixed Convection in a Cubical Cavity Containing a Hot Block

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

A numerical investigation of the effect of sinusoidal temperature on mixed convection flow in a cavity filled with a nanofluid with moving vertical walls

Contact Info

Product

Resources

About