Natural convection in a square enclosure with four circular cylinders positioned at different rectangular locations

Park, Y.G.; Ha, Man Yeong; Park, J.

doi:10.1016/j.ijheatmasstransfer.2014.10.065

Cited by 60 publications

(11 citation statements)

References 21 publications

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“…The experimental results show that the heat transfer behavior is related to the relative size of the closed boundary and the position of the tube bundles. A two-dimensional solution for natural convection in an enclosure with 2 × 2 tube bundles was obtained by Park et al (2015). The numerical results show the similar conclusions with Keyhani that locations of the cylinders affect the heat transfer in the enclosure.…”

Section: Introductionsupporting

confidence: 65%

Natural Convection Heat Transfer of the Horizontal Rod-Bundle in a Semi-closed Rectangular Cavity

Mao

Xia

2020

Front. Energy Res.

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During the refueling of PWR, the spent fuel assemblies are transferred from the reactor building to the fuel building through an underwater tube. The heat transfer characteristics of the spent fuel assembly in the top-corner area of the carrier with poor heat transfer conditions is important for the safety design. Experiments were carried out and single phase natural convection and pool boiling heat transfer coefficients of the three fuel rods in the top-corner area of the carrier under different heat flux was measured and obtained. The new correlations were presented. The results can provide a reference for evaluating the thermal safety state and the maximum surface temperature of the fuel assembly during the transportation process in future engineering applications.

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Section: Introductionsupporting

confidence: 65%

Natural Convection Heat Transfer of the Horizontal Rod-Bundle in a Semi-closed Rectangular Cavity

Mao

Xia

2020

Front. Energy Res.

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“…The combination of the conditions of the enclosure and the internal bodies provides various reach topics. Thus, numerous studies have dealt with the natural convection for the internal bodies in the enclosure by considering the individual condition or combined conditions such as the thermal boundary [1][2][3][4][5], the shape [3,4,[6][7][8][9], 3D effect [2,[10][11][12], the size [8,9,11,[13][14][15][16][17][18][19][20][21][22], the number of the internal bodies [23], the concentric and eccentric internal body [12,[23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40], Rayleigh number…”

Section: Introductionmentioning

confidence: 99%

Classification of Flow Modes for Natural Convection in a Square Enclosure with an Eccentric Circular Cylinder

Yoon¹,

Shim²

2021

Energies

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The present study investigated the natural convection for a hot circular cylinder embedded in a cold square enclosure. The numerical simulations are performed to solve a two-dimensional steady natural convection for three Rayleigh numbers of 103, 104 and 105 at a fixed Prandtl number of 0.7. This study considered the wide range of the inner cylinder positions to identify the eccentric effect of the cylinder on flow and thermal structures. The present study classifies the flow structures according to the cylinder position. Finally, the present study provides the map for the flow structures at each Rayleigh number (Ra). The Ra = 103 and 104 form the four modes of the flow structures. These modes are classified by mainly the large circulation and inner vortices. When Ra = 105, one mode that existed at Ra = 103 and 104, disappears in the map of the flow structures. The new three modes appear, resulting in total six modes of flow structures at Ra = 105. New modes at Ra = 105 are characterized by the top side secondary vortices. The corresponding isotherms are presented to explain the bifurcation of the flow structure.

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“…Park et al 8 analyzed the natural convection heat transfer provoked by a temperature difference in a cold external square cavity and four hot interior circular cylinders arranged in a rectangular array. Mun et al 9 investigated natural convection heat transfer influenced by a temperature gradient in a sloped square cavity containing a hot internal circular cylinder for different Prandtl (10 −2 ≤ Pr ≤ 10 2 ) and Rayleigh numbers (10 3 ≤ Ra ≤ 10 6 ).…”

Section: Introductionmentioning

confidence: 99%

Numerical research of double‐diffusive natural convection in elliptical cylinders: Effect of thermal Rayleigh number

et al. 2020

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This paper is the first part of a two-part study, and it presented numerical research of double-diffusive natural convection within an annulus area, situated in two horizontal confocal elliptic solids charged by a Newtonian fluid. The elliptical coordinates were used to transform the physical domain into a rectangular one. To resolve the governing equations and the boundary layer conditions, a calculator code based on the finite volume approach was developed. The details of the influences of thermal Rayleigh number on heat and mass transfer were investigated. Results obtained were compared with those existing in other reasearch works. K E Y W O R D S double-diffusive, elliptical cylinders, natural convection, Rayleigh number, stream function formulation

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Natural convection in a square enclosure with four circular cylinders positioned at different rectangular locations

Cited by 60 publications

References 21 publications

Natural Convection Heat Transfer of the Horizontal Rod-Bundle in a Semi-closed Rectangular Cavity

Natural Convection Heat Transfer of the Horizontal Rod-Bundle in a Semi-closed Rectangular Cavity

Classification of Flow Modes for Natural Convection in a Square Enclosure with an Eccentric Circular Cylinder

Numerical research of double‐diffusive natural convection in elliptical cylinders: Effect of thermal Rayleigh number

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