Natural convection in a triangular cavity filled with air under the effect of external air stream cooling

Saleem, Khalid B.; Alshara, Ahmed K.

doi:10.1002/htj.21537

Cited by 15 publications

(5 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This indicated that HT is influenced by the deformation of the lower wall of the cavity. Saleem and Alshara 22 focused on a numerical examination of NC flow in a triangular cavity exposed to a cold air stream from both side walls. They found that the AR influences HT, with an 83% increase as AR goes from 0.25 to 1.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer assessment incorporated with entropy generation within a curved corner structure enclosing a cold domain

Saboj,

Nag,

Saha

et al. 2024

Heat Trans

View full text Add to dashboard Cite

In cold climates or winter countries, maintaining optimal room temperatures is essential for comfort and energy efficiency. Conventional square or rectangle‐shaped rooms often face challenges in achieving efficient heat transfer (HT) and uniform temperature distribution. To address these limitations, this study has been explored using curved corner cavities, varying their aspect ratio (AR = 1.0 and 0.5), and incorporating a circular shape cooler to enhance HT within the room. The curved corners promote better airflow circulation, creating a more efficient HT environment. The dimensionless governing equations and corresponding boundary conditions are solved numerically using the finite element method. This research aims to assess the optimized HT and entropy production within a curved corner cavity, varying their AR and enclosing a circular shape cooler to determine the most effective configuration for maximizing HT and energy efficiency in winter conditions. This study reveals that in the case without a cooler (WOC), the average Nusselt number () is higher in the curved rectangle cavity compared with the curved square cavity for all values. Using the curved square (AR = 1.0), increases by 191.86%, while with the curved rectangle (AR = 0.5), increases by 302.63% at . Additionally, in the case with a cooler (WC), is higher than the case WOC and , and an average total entropy increases for both the WOC and WC cases for all values. Transitioning from a square to a curved rectangle (AR = 0.5) WC, increases by 329.34% at . Furthermore, in the WOC case, the curved square cavity and, in the WC case, the curved rectangle show better energy efficiency and reduce environmental impact.

show abstract

Section: Introductionmentioning

confidence: 99%

Heat transfer assessment incorporated with entropy generation within a curved corner structure enclosing a cold domain

Saboj,

Nag,

Saha

et al. 2024

Heat Trans

View full text Add to dashboard Cite

show abstract

“…For different inclination angles, the LBM with a single relaxation time (SRT) is employed as a computational fluid dynamics (CFD) alternative method to explore the flows of water and air in a triangular enclosure 35,36 . Saleem et al 37 investigated the influence of the aspect ratio, in addition to the inclination effect, on air convective flow in a triangular enclosure. The cavity is heated by fixed heat flux from the base and is subjected to air‐stream cooling on its sides.…”

Section: Introductionmentioning

confidence: 99%

Cavity inclination effect on convection flow in a triangular geometry

et al. 2023

View full text Add to dashboard Cite

In this study, the water convection flow within a right‐angled, inclined, and isosceles triangle enclosure for various inclination angles was numerically analyzed using the lattice Boltzmann method with the multirelaxation time model. On the hypotenuse side, the enclosure is thermally insulated, while the left and horizontal walls are kept, respectively, at cold and hot temperatures. This study was conducted to show the effects of two key parameters, the tilt angle ϕ $\phi $ and the Rayleigh number Ra $Ra$, whose changes span from 0∘ ${0}^{\circ }$ to 315∘ $31{5}^{\circ }$ and 5×103 $5\times 1{0}^{3}$ to 106 $1{0}^{6}$, respectively. The effect of these variables is presented in terms of streamlines, isotherms, velocity profiles, temperature plots, and the average Nusselt number. Furthermore, the impact of the size of a hot square obstruction inside the cavity on the isotherms and streamlines has been investigated. The findings demonstrate that the rate of heat transport is enhanced as the Rayleigh number increases. This result is in good agreement with earlier research without tilting the cavity. Depending on the Rayleigh number, the tilt angle has a significant effect on the rate of heat transmission.

show abstract

“…Numerous of the previous researches on natural convection have focused on rectangular enclosures with a vertical (Rayleigh-Benard convection) or a horizontal gradient of temperature [9,10], while others have studied rectangular cavities partially heated or cooled [11,12]. Natural convection in triangular enclosures [13][14][15] has been treated also due to its widespread use in many industrial and domestic systems such as building roofs and solar power, etc. Yesiloz et al [16] and Oztop et al [17] have studied experimentally the natural convection of water and air, respectively, in a right-angled triangular cavity.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Natural Convection by Multirelaxation Time Lattice Boltzmann Method in a Triangular Enclosure

Baliti

Elguennouni

Hssikou

et al. 2022

Fluids

View full text Add to dashboard Cite

The natural convection of incompressible flow confined within an enclosed right-angled triangular and isosceles cavity was investigated numerically using the multirelaxation time lattice Boltzmann method (MRT-LBM). According to the left and inclined walls thermal boundary conditions, two cases were considered in this study. In the first case, the inclined side of the enclosure was adiabatic, and the horizontal wall was heated, while the left one was kept at a cold temperature. However, the states of the left and inclined walls were interchanged in the second case. As the flow is only transported under the convection force, this study was carried out for the Rayleigh number ranging from Ra=103 to 106. The effects of the Rayleigh number on velocity and temperature profiles, streamlines, isotherms, and average Nusselt number were investigated. The position of cold and adiabatic walls had a great effect on the results. The results obtained are in good agreement with those of the literature and show the robustness of the MRT-LBM approach. In both cases, the heat-transfer rate increases with the increase in the Rayleigh number.

show abstract

Natural convection in a triangular cavity filled with air under the effect of external air stream cooling

Cited by 15 publications

References 41 publications

Heat transfer assessment incorporated with entropy generation within a curved corner structure enclosing a cold domain

Heat transfer assessment incorporated with entropy generation within a curved corner structure enclosing a cold domain

Cavity inclination effect on convection flow in a triangular geometry

Simulation of Natural Convection by Multirelaxation Time Lattice Boltzmann Method in a Triangular Enclosure

Contact Info

Product

Resources

About