Natural convection in a side-facing open cavity

Skok, H.; Ramadhyani, S.; Schoenhals, R. J.

doi:10.1016/0142-727x(91)90006-h

Cited by 31 publications

(13 citation statements)

References 14 publications

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“…Extensive studies on convective losses from cubical and rectangular open cavities have been reported (Le Quere et al [7,8]; Penot [9]; Hess and Henze [10]; Chen et al [11]; Chan and Tien [12,13]; Pavlovic and Penot [14]; Skok et al [15]; Chakroun et al [16]). In these studies, the cavity walls are either uniformly heated or one wall is heated and others are maintained in adiabatic condition.…”

Section: Introductionmentioning

confidence: 96%

Determination of stagnation and convective zones in a solar cavity receiver

Prakash

Kedare

Nayak

2010

International Journal of Thermal Sciences

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Section: Introductionmentioning

confidence: 96%

Determination of stagnation and convective zones in a solar cavity receiver

Prakash

Kedare

Nayak

2010

International Journal of Thermal Sciences

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“…Skok et al [42] carried out a combined experimental and numerical study of laminar buoyancy-driven flow in open rectangular cavity. The cavity was submerged in a tank with mixture of water and glycerol that acted as working fluid.…”

Section: Numerical-experimental Studiesmentioning

confidence: 99%

“…In literature are reported several studies of heat transfer in open cavities, which can be classified as: (a) numerical , (b) experimental [38][39][40][41] and (c) numerical-experimental [42][43][44]. Most of numerical studies has been conducted with a two-dimensional approach, however the three dimensional description of the phenomena is more realistic.…”

Section: Introductionmentioning

confidence: 97%

Experimental and numerical study of turbulent natural convection in an open cubic cavity

2015

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k Turbulent kinetic energy (J/kg) L Cavity wall length (m) Nu Local convective Nusselt number nondimensional Nu Total average Nusselt number nondimensional P k Generation of turbulent kinetic energy (J/kg) q″ Heat flux (W/m 2 ) Ra Rayleigh number = gβq″L 4 /ανλ, nondimensional T h Average temperature of the hot wall (K) T ∞ Ambient temperature (K) V Voltage (V) X, Y, Z Coordinate system (m) Greek symbols α Thermal diffusivity (m 2 /s) β Thermal expansion coefficient (1/K) ε t Turbulent kinetic energy dissipation (J/kg) λ Thermal conductivity (W/m K) µ t Turbulent viscosity (kg/m s) ν Kinematic viscosity (m 2 /s) ρ Density (kg/m 3 ) σ t Turbulent Prandtl number nondimensional

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“…It is observed from the literature that experimental and numerical studies on natural convection in open cavities have been performed for different cavity shapes, namely, cubical [1][2][3][4][5][6], rectangular [7][8][9][10][11][12][13][14][15][16][17], and square [18][19][20][21][22][23][24]. Studies have also been reported on other cavity shapes used for specific applications like solar thermal receivers [25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

“…In the studies involving open cavity natural convection, two basic boundary wall conditions are observed: (a) all the walls of the open cavity were heat transfer surfaces at constant temperature [1,2,4,6,8,9,12,18,19,21,22,25,26,[30][31][32], henceforth referred to as isothermal wall boundary condition and (b) only one wall (wall opposite to the aperture) was at constant temperature and the remaining walls were kept adiabatic, henceforth referred to as constant temperature back wall boundary condition [3,5,10,11,13,20,23,24,33]. Other wall boundary conditions such as one wall having constant heat flux and other walls being adiabatic [14][15][16] and nonisothermal wall temperatures [7,[27][28][29] were also studied.…”

Section: Introductionmentioning

confidence: 99%

Numerical Studies on Natural Convection Heat Losses from Open Cubical Cavities

Prakash

2013

Journal of Engineering

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The natural convection heat losses occurring from cubical open cavities are analysed in this paper. Open cubical cavities of sides 0.1 m, 0.2 m, 0.25 m, 0.5 m, and 1 m with constant temperature back wall boundary conditions and opening ratio of 1 are studied. The Fluent CFD software is used to analyse the three-dimensional (3D) cavity models. The studies are carried out for cavities with back wall temperatures between 35 ∘ C and 100 ∘ C. The effect of cavity inclination on the convective loss is analysed for angles of 0 ∘ (cavity facing sideways), 30 ∘ , 45 ∘ , 60 ∘ , and 90 ∘ (cavity facing vertically downwards). The Rayleigh numbers involved in this study range between 4.5 × 10 5 and 1.5 × 10 9 . The natural convection loss is found to increase with an increase in back wall temperature. The natural convection loss is observed to decrease with an increase in cavity inclination; the highest convective loss being at 0 ∘ and the lowest at 90 ∘ inclination. This is observed for all cavities analysed here. Nusselt number correlations involving the effect of Rayleigh number and the cavity inclination angle have been developed from the current studies. These correlations can be used for engineering applications such as electronic cooling, low-and medium-temperature solar thermal systems, passive architecture, and also refrigeration systems.

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Natural convection in a side-facing open cavity

Cited by 31 publications

References 14 publications

Determination of stagnation and convective zones in a solar cavity receiver

Determination of stagnation and convective zones in a solar cavity receiver

Experimental and numerical study of turbulent natural convection in an open cubic cavity

Numerical Studies on Natural Convection Heat Losses from Open Cubical Cavities

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