Experiments on turbulent natural convection in an enclosed tall cavity

Betts, P. L.; Bokhari, Ishtiaq Hussain

doi:10.1016/s0142-727x(00)00033-3

Cited by 182 publications

(121 citation statements)

References 9 publications

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“…[20][21][22][23][24] Ostrach 25 , Catton 26 , and Yang 27 carried out a literature review on this subject, which included both the experimental and modeling results (2D and 3D). These authors emphasize the importance of the aspect ratio of the cavity and the temperature difference between walls on the flow regimes.…”

Section: Heat Transfer and Airflow In Empty Closed Cavitymentioning

confidence: 99%

Heat Transfer and Air Flow in a Domestic Refrigerator

Laguerre¹

2010

Mathematical Modeling of Food Processing

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Section: Heat Transfer and Airflow In Empty Closed Cavitymentioning

confidence: 99%

Heat Transfer and Air Flow in a Domestic Refrigerator

Laguerre¹

2010

Mathematical Modeling of Food Processing

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“…Lartigue et al [13] proposed that cells did not keep stationary in vertical enclosures with an aspect ratio of 40 and a Rayleigh number of 9222. Betts and Bokhari [14] carried out experimental studies to investigate the turbulent natural convection of air in a tall rectangular cavity and showed that the flow and temperature fields were closely two-dimensional. Manz [15] found that the onset of turbulence occurred at higher Rayleigh numbers for lower aspect ratios in vertical enclosures.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Study of Fluid Flow and Heat Transfer in Carbon Dioxide Enclosures on Mars

Sun

Lin

et al. 2018

Energies

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Abstract:In order to support the future thermal control and energy conservation design for the Mars rover, numerical studies on natural convection in CO 2 enclosures on Mars' surface were conducted for both horizontal and vertical enclosures. The parameters are as follows: the atmospheric pressure was 1000 Pa, the gravitational acceleration was 3.62 m/s 2 , and the Prandtl number was 0.77. The heat flux, temperature, and velocity fields of the CO 2 enclosures were obtained with the aspect ratio ranging from 5.56 to 200 and the Grashof number ranging from 430 to 2.6 × 10 4 . It was found that natural convection formed more easily in the horizontal enclosures than that in the vertical enclosures when the enclosures had same thickness. With the increasing thickness of the enclosures, Rayleigh-Bénard convections formed in the horizontal enclosures, while only single-cell convections formed in the vertical enclosures. The heat flux through the horizontal enclosures was greater than that through the vertical enclosures with the same thickness when natural convection formed. The maximum difference between them reached 35.26%, which was illustrated by the field synergy principle. A hysteresis phenomenon of the natural convection dominating the heat transfer was found in the vertical enclosure on Mars' surface. New values for the critical Grashof number and correlations for the average Nusselt number for both the horizontal and vertical CO 2 enclosures on Mars' surface were also developed.

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“…That is, there is no air movement from the exterior environment to the cavity or from the cavity to the outside, and there is a temperature difference between the interior and exterior surfaces. This phenomenon of differentially heated/cooled cavities has been studied extensively in the literature [2][3][4][5][6][7][8][9][10][11][12][13]. On the other hand, some double skin facade applications have been designed considering open cavity natural convection [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…Many numerical and experimental studies related to airproof double skin facades (DSFs) with an enclosed cavity have also been carried out in the literature [7,19,20]. Betts and Bokhari [7] experimentally investigated the natural convection of air in a tall rectangular cavity that is differentially heated.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical investigation of natural convection in a double skin facade

İnan

Başaran

Ezan

2016

Applied Thermal Engineering

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In this study, airflow and heat transfer in a rectangular cavity that simulates a double skin facade and includes natural convection were examined numerically and experimentally. This cavity separates the exterior space and the thermally controlled interior space. The temperatures of the surfaces that interact with these spaces were determined experimentally, while the other surfaces were regarded as adiabatic. With these temperature values, the parameters of the numerical study were defined. After the validation of the numerical model was completed based on experimental studies in the literature, the results related to flow and heat transfer in the cavity were analyzed. The numerical model provided results that agree with the air temperature values found experimentally in the cavity. Accordingly, in natural convection, with Rayleigh numbers ranging from 8.59 ∗ 109 to 1.41 ∗ 1010 and the effect of buoyancy on the regions close to the surface, the increasing tendency of the average Nusselt number from 142.6 to 168.8 was shown. In addition, a correlation between the Rayleigh and Nusselt numbers for a cavity aspect ratio of 8.64 was constructed to evaluate the heat flux; this correlation was also shown graphically.Scientific and Technological Research Council of Turkey (112M170

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Experiments on turbulent natural convection in an enclosed tall cavity

Cited by 182 publications

References 9 publications

Heat Transfer and Air Flow in a Domestic Refrigerator

Heat Transfer and Air Flow in a Domestic Refrigerator

A Numerical Study of Fluid Flow and Heat Transfer in Carbon Dioxide Enclosures on Mars

Experimental and numerical investigation of natural convection in a double skin facade

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