Experimental and numerical study of natural convection heat transfer from horizontal concentric cylinders

Atayılmaz, Ş. Özgür

doi:10.1016/j.ijthermalsci.2011.03.019

Cited by 29 publications

(11 citation statements)

References 32 publications

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“…Churchill and Chu 17 and Morgan 18 proposed comprehensive correlations for free convection from a horizontal cylinder for a broad range of Rayleigh number. Wide-ranging research on free convection from a horizontal cylinder was also conducted by Özgür Atayilmaz 19 and Teke. 20 However, Chen et al 36 investigated the impact of geometry on the flow surrounding a cylinder in crossflow.…”

Section: Literature Reviewmentioning

confidence: 99%

Natural Convection from the Outside Surface of an Inclined Cylinder in Pure Liquids at Low Flux

et al. 2019

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Many studies have investigated natural convection heat transfer from the outside surface of horizontal and vertical cylinders in both constant heat flux and temperature conditions. However, there are poor studies in natural convection from inclined cylinders. In this study, free convection heat transfer was examined experimentally from the outside surface of a cylinder for glycerol and water at various heat fluxes. The tests were performed at 10 different inclination angles of the cylinder, namely, φ = 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, and 90°, measured from the horizon. Our results indicated that the average Nusselt number reduces with the growth in the inclination of the cylinder to the horizon at the same heat flux, and the average Nusselt number enhanced with the growth in heat flux at the same angle. Also, the average Nusselt number of water is greater than that of glycerol. A new experimental model for predicting the average Nusselt number is suggested, which has a satisfactory accuracy for experimental data.

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Section: Literature Reviewmentioning

confidence: 99%

Natural Convection from the Outside Surface of an Inclined Cylinder in Pure Liquids at Low Flux

et al. 2019

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“…In 2011, Ataylmaz [17] studied the free convection heat transfer from horizontal concentric cylinders, experimentally as well as numerically, using Fluent software. It is reported that Raithby and Hollands correlation fails for experimental data of that study due to curvature e ects.…”

Section: Literature Surveymentioning

confidence: 99%

Combination of projection and Galerkin finite element methods to solve the problem of free convection in enclosures with complex geometries

Zendehbudi

2017

Scientia Iranica

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Abstract. In the present work, a numerical method for solving the problem of free convection in enclosures with complex geometries is developed. This development is executed by the combination of projection and Galerkin nite-element methods. Ninenode (quadratic) quadrilateral elements are used to generate the grid for the eld of the problem. The results show that the convergence of this method is acceptable while there is no necessity to use upwind schemes. Increasing the numbers of nodes and decreasing the time increment yield a more accurate solution. The advantages of this numerical method are the ability to model any complex geometry and no necessity to use upwind schemes.

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“…The internal natural convection in an enclosure has been extensively studied in the past, as described in a recent review given by Baïri et al [8], for examples, concentric annulus [9,10], eccentric annulus [11e13], parallelogrammic enclosures [14], and adiabatic rotating cylinder [15]. The results obtained are important and helpful for some industrial applications with similar geometry structure and fluid flow arrangement, such as the cooling of underground electric transmission cables, food processing, and even the complex nuclear reactors.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of natural convection between hot and cold microtubes in a cylinder enclosure

Dai

Lei

et al. 2015

International Journal of Thermal Sciences

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Experimental and numerical study of natural convection heat transfer from horizontal concentric cylinders

Cited by 29 publications

References 32 publications

Natural Convection from the Outside Surface of an Inclined Cylinder in Pure Liquids at Low Flux

Natural Convection from the Outside Surface of an Inclined Cylinder in Pure Liquids at Low Flux

Combination of projection and Galerkin finite element methods to solve the problem of free convection in enclosures with complex geometries

Numerical simulation of natural convection between hot and cold microtubes in a cylinder enclosure

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