Experimental and numerical investigation of turbulent natural convection in a large air-filled cavity

Salat, Jacques; Xin, Shihe; Joubert, Patrice; Sergent, Anne; Penot, François; Quéré, Patrick Le

doi:10.1016/j.ijheatfluidflow.2004.04.003

Cited by 143 publications

(107 citation statements)

References 16 publications

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“…To investigate the natural convection problem, the effect of viscous heat dissipation can be neglected for applications in incompressible flow (Salat et al, 2004) such that a simple LBM can be used.…”

Section: Fig 1 Studied Configurationmentioning

confidence: 99%

“…Their results showed that increase of the Rayleigh number leads to an increase of flow turbulence, and then the averaged Nusselt number increases. (Salat et al, 2004) investigated, experimentally and numerically, turbulent natural convection flows in a differentially heated cavity of height H=1m, width L=H and depth P=0.32H, submitted to a temperature difference between the active vertical walls equal to 15K. In the experiment, temperature is measured by 25 micro thermocouples and velocity by a Laser Doppler Anemometer.…”

Section: Introductionmentioning

confidence: 99%

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Lattice Boltzmann Method for Natural Convection Flows in a Full Scale Cavity Heated from Below

Abouricha¹,

Alami²,

Kriraa³

et al. 2017

AJHMT

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In this work, we use the lattice Boltzmann method (LBM) to simulate High Rayleigh number natural convection flows in a cavity filled with air and heated from below. One of the vertical walls has a cold portion, while the other walls are adiabatic. This cavity simulates a living space with under-floor heating and fitted with a glass door (single glass). Computations are made in two dimensions for high values of Rayleigh number. The model uses the double populations approach to simulate hydrodynamic and thermal fields. The traditional LBM with a non-uniform grid has high grid requirements at higher Rayleigh number values. The results are presented in terms of streamlines and isotherms. Variation of the local Nusselt number on the walls is shown and discussed. Global heat transfer has been studied in terms of average Nusselt number which is correlated with Rayleigh number. Dimensionless profiles of temperature and velocity along the vertical and horizontal centerline are illustrated.

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Section: Fig 1 Studied Configurationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lattice Boltzmann Method for Natural Convection Flows in a Full Scale Cavity Heated from Below

Abouricha¹,

Alami²,

Kriraa³

et al. 2017

AJHMT

View full text Add to dashboard Cite

show abstract

“…In view of a variety of shapes and thermal conditions of these devices the obstructions are considered in the form of partitions, partial baffles and discrete bodies and are assumed to be either isothermal or iso-flux or heat generating. Among the various known cooling techniques used in such applications, natural convection cooling using air as the medium is the most widely used one as it is simple to design, cheap, noise free and highly reliable [1][2][3][4][5][6][7][8][9][10][11][12][13]. For example, Sharma et al [9] studied the interaction of turbulent natural convection and surface thermal radiation in inclined square enclosures.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of a Corrugated Heat Source Cavity: A Full Convection-Conduction-Radiation Coupling

Sadripour¹

2017

AJAE

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Abstract:In present study a numerical analysis of complex heat transfer (turbulent natural convection, conduction and surface thermal radiation) in a rectangular enclosure with a heat source has been carried out. The finite volume method based on SIMPLEC algorithm has been utilized. The effects of Rayleigh number in a range from 10 8 to 10 11 , internal surface emissivity 0≤ε˂1 on the fluid flow and heat transfer have been extensively explored. Detailed results including temperature fields, flow profiles, and average Nusselt numbers have been presented. In this investigation it has been tried to study the shape of heat source influence on heat transfer and fluid field in the considered domain. According to results in low emissivity values usage of circular obstacles is recommended. Although in high emissivity values using rectangular obstacles lead to more efficiency.

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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%

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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Experimental and numerical investigation of turbulent natural convection in a large air-filled cavity

Cited by 143 publications

References 16 publications

Lattice Boltzmann Method for Natural Convection Flows in a Full Scale Cavity Heated from Below

Lattice Boltzmann Method for Natural Convection Flows in a Full Scale Cavity Heated from Below

Numerical Investigation of a Corrugated Heat Source Cavity: A Full Convection-Conduction-Radiation Coupling

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

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