Laminar and turbulent natural convection in an enclosed cavity

Markatos, N.C.; Pericleous, K.

doi:10.1016/0017-9310(84)90145-5

Cited by 529 publications

(232 citation statements)

References 12 publications

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“…Vertical walls were isothermal and horizontal boundaries were assumed adiabatic. Comparison of the fields of temperature and average Nusselt numbers with [12,13] showed their satisfactory agreement.…”

Section: Problem Formulation and Solution Methodsmentioning

confidence: 75%

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Simulation of Turbulent Natural Convection in a Local Zone of Largescale Area Under Conditions of the Radiant Energy Supply

Nee

Valieva

2016

MATEC Web Conf.

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Abstract. This paper presents the results of mathematical modelling of turbulent natural convection under conditions of the conjugate heat transfer in an open cavity heated by infrared emitter. Two-dimensional problem of heat transfer was formulated in the vorticity -stream function -temperature dimensionless variables and solved by means of the finite difference method on a uniform grid. According to the results of numerical analysis, the fields of differential and integral heat transfer characteristics, illustrating the unsteady nature of the thermophysical process under study, were obtained. The nonlinear dependence of the average Nusselt number versus dimensionless time ( W ) was established. It was shown that the average Nusselt number monotonically increased in a range of 800 2000 W

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Section: Problem Formulation and Solution Methodsmentioning

confidence: 75%

“…The solution method and algorithm used were tested on a model problem of turbulent natural convection in a closed square cavity [12,13]. Vertical walls were isothermal and horizontal boundaries were assumed adiabatic.…”

Section: Problem Formulation and Solution Methodsmentioning

confidence: 99%

Simulation of Turbulent Natural Convection in a Local Zone of Largescale Area Under Conditions of the Radiant Energy Supply

Nee

Valieva

2016

MATEC Web Conf.

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“…Heat transfer through the walls causes density changes to the fluid inside the cavity and leads to buoyancy-driven circulation. The flow is assumed to be steady and laminar (Ra ≤ 10 6 ) based on extensive studies [15]. Air is used as the simulant and the properties are taken at ambient temperature except density.…”

Section: Benchmark Validationmentioning

confidence: 99%

Studies on Convective Cooling of Cryogenic Fluids Towards Superconducting Applications

Satpathy

Dubois

Duchesne

et al. 2017

Computational Methods and Experimental Measurements XVIII

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To understand the cooling aspect through natural convection in a cryogenic fluid interacting with a constant heat source, numerical simulations are carried out in a parallelepiped enclosure. The 3D form of N-S equations is solved to obtain the detailed flow features through path line profiles, isotherm contours and velocity vectors. The effect of heater aspect ratio (x/L) on the rate of heat transfer is studied in terms of the average Nusselt number (Nuave). The results indicate that effective heat transfer enhancement occurs for a small heater length, resulting in an efficient cooling. Increasing the heater length will favor heat transfer through conduction over convection. The maximum temperature difference across the fluid and the velocity magnitude are found to decrease with heater length. 3D and 2D results are in agreement for short heater lengths, but vary for higher heater lengths, presumably due to the essential effect of the heater width. Further analysis on different types of coolant reveals a constant correlation between Nuave and the Rayleigh number (Ra), with Nuave ~ Ra 0.374 . Benchmark validation for natural convection in a square enclosure is found to be satisfactory against the reported results.

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“…The flow in a square cavity is turbulent for Ra > 10 6 [7,8,9]. For flow in vertical cavities Gan [10] used Ra  5.8  10…”

Section: Introductionmentioning

confidence: 99%

“…Markatos and Pericleous [8] were the first to introduce a turbulence model in their calculations. Allocca et al [4] used the RNG (k -) model to analyze buoyancy induced flow through a singlesided window.…”

mentioning

confidence: 99%

A Numerical Study to Find the Effect of Boundary Conditions on Natural Convection Flow in an Open Cavity

Tasnim

Bangalee

2017

GANIT: J. Bangladesh Math. Soc.

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Laminar and turbulent natural convection in an enclosed cavity

Cited by 529 publications

References 12 publications

Simulation of Turbulent Natural Convection in a Local Zone of Largescale Area Under Conditions of the Radiant Energy Supply

Simulation of Turbulent Natural Convection in a Local Zone of Largescale Area Under Conditions of the Radiant Energy Supply

Studies on Convective Cooling of Cryogenic Fluids Towards Superconducting Applications

A Numerical Study to Find the Effect of Boundary Conditions on Natural Convection Flow in an Open Cavity

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