CFD Modeling of Natural Convection in Right-Angled Triangular Enclosures

Mirabedin, Seyed Milad

doi:10.18280/ijht.340322

Cited by 10 publications

(10 citation statements)

References 9 publications

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“…The applied voltage ∆V=V0-V1 for the electric potential, ∆V/L for the electric field, q0 for the charge density, ε0K∆ 2 /L 3 for the current density, V/L for the velocity, P0v 2 /L 2 for the pressure, L 2 /v for the time and θ/(θ0-θ1) for the temperature. The above set of coupled equations is solved numerically using the finite element software COMSOL Multiphysics [20][21]. Figure 2 displays the computational mesh.…”

Section: Mathematical Formulation and Numerical Modelmentioning

confidence: 99%

Numerical Study of Electro-convection and Electro-thermo-convection in Solar Chimney Geometry

Gannoun¹,

Hassen²,

Pérez³

et al. 2019

EJEE

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In this article, a numerical study was conducted to analyze the effect of electro-convection and electro-thermo-convection in a solar chimney geometry subjected to the simultaneous action of an electric field and a thermal gradient (in the case of electro-thermo-convection). The full set of equations is solved using the finite element software COMSOL Multiphysics. The effects of thermal and electric Rayleigh numbers on charge density distribution, fluid flow and temperature distribution are analyzed. Also the impact of different chimney collector widths is studied in order to determine the optimum width allowing achieving the maximum fluid velocity. It was shown that using a smaller chimney collector width is more convenient in order to increase the fluid flow velocity. In addition, an evaluation of the heat transfer enhancement was made by observing the evolution of heat flow at the exit of the chimney tower as a function of both, the electric and thermal Rayleigh numbers. It was found that the heat transfer enhancement reaches more than 90 % when thermal Rayleigh rises from 5000 to 20000. Finally, the effect of Prandtl number was investigated.

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Section: Mathematical Formulation and Numerical Modelmentioning

confidence: 99%

Numerical Study of Electro-convection and Electro-thermo-convection in Solar Chimney Geometry

Gannoun¹,

Hassen²,

Pérez³

et al. 2019

EJEE

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“…They confirmed that in the condition of adding nanoparticle into the main fluid, higher heat exchange and entropy generation is obtained. Mirabedin performed a two‐dimensional numerical simulation to examine natural convection in right‐angled triangular cavities utilizing water, using several aspect ratios. He confirmed that augmenting the aspect ratio augments the mean Nusselt number in a cavity experiencing heating from below.…”

Section: Introductionmentioning

confidence: 99%

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

Saleem

Alshara

2019

Heat Trans. Asian Res.

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Natural convection in a triangular cavity filled with air is investigated numerically. In this paper, the cavity is exposed to air stream cooling exerted on its sides and it is heated by a fixed heat flux from the base. The air inside the cavity is assumed to be laminar and obeying Boussinesq approximation. The governing equations are solved numerically using the finite volume technique with SIMPLE algorithm. The results are achieved with a range of Rayleigh number (104 < Ra < 107), free stream Reynolds number (103 < Re∞ < 1.5 × 104), four aspect ratios (AR = 0.25, 0.5, 0.866, and 1) and five inclination angles (ϕ = 0°, 30°, 45°, 60°, 90°). The influence of these parameters is displayed on the stream function, isotherms lines, local and average Nusselt numbers. The results reveal that the heat transfer rate increases as Rayleigh number, free stream Reynolds number and AR increase. The highest heat transfer rate is obtained at ϕ = 0° while the lowest one is obtained at ϕ = 90°. Furthermore, as the AR augments, the local and average Nusselt numbers are enhanced and the stream function is formed of two symmetric counter‐rotating vortices.

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“…Mirabedin [3] formulated a correlation for Nusselt number in terms of its aspect ratio and Rayleigh number in case of a triangular enclosure and found that the Nusselt number increased with increase in aspect ratio. Kamiyo et al [4] studied the heat transfer in an asymmetric triangular enclosure with a hot isothermal base wall.…”

Section: Introductionmentioning

confidence: 99%

Combined Natural Convection and Surface Radiation Inside Vented Triangular Enclosure - An Experimental Study

Raj

Pradyumna²,

Rakshith³

et al. 2018

MATEC Web Conf.

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Abstract. In the present experimental study, the influence of Opening ratio on the chamber temperature in case of vented triangular enclosure with hot base plate has been undertaken. Due to more flow passage, the average air temperature in the enclosure decreases by 12% for OR of 0.25 and 13% for OR of 0.5 compared to OR of 0.125. Similar trend is observed for Rayleigh number with a rise of 73% in OR 0.5 compared to OR of 0.125. Further, the influence of radiation heat transfer in the natural convection based enclosure is also studied. This kind of investigation is useful in the design and analysis of electronic cooling systems.

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CFD Modeling of Natural Convection in Right-Angled Triangular Enclosures

Cited by 10 publications

References 9 publications

Numerical Study of Electro-convection and Electro-thermo-convection in Solar Chimney Geometry

Numerical Study of Electro-convection and Electro-thermo-convection in Solar Chimney Geometry

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

Combined Natural Convection and Surface Radiation Inside Vented Triangular Enclosure - An Experimental Study

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