Three-dimensional vortex flow near the endwall of a short cylinder in crossflow: Stepped-diameter circular cylinder

Chen, S.B.; Sanitjai, Surachai; Ghosh, Kapil; Goldstein, R. J.

doi:10.1016/j.applthermaleng.2012.01.060

Cited by 3 publications

(4 citation statements)

References 13 publications

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“…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. Three various stepped-diameter circular cylinders (SDCCs) were used with different step heights.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Prhashanna and Chhabra , studied free convective heat transfer for a horizontal cylinder immersed in quiescent power-law fluids numerically. Goldstein et al − investigated the impact of geometry on the flow surrounding a cylinder in crossflow. They found that the mass/heat transfer analogy is verified experimentally for laminar, two-dimensional, and turbulent boundary layer flows over the cylinder and flat plates.…”

Section: Literature Reviewmentioning

confidence: 99%

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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%

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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“…Saghafian [26] conducted a study of steady incident flow past a circular cylinder for sub-to supercritical Reynolds numbers by considering an unsteady Reynolds-averaged Navier-Stokes (RANS) formation with nonlinear eddy-viscosity modelling. Recently, cylinder, as a structure component, is used in many fields [27][28][29]. A Numerical analysis of heat transfer and flow field around cross-flow heat exchanger tube with fouling was conducted by Vessakosol and Charoensuk [27].…”

Section: Introductionmentioning

confidence: 99%

“…They found that the heat transfer rate of cross-flow heat exchanger depends on the eccentricity and thermal conductivity ratio between the fouling material and fluid. Chen et al [28] concentrated on the three-dimensional vortex flow near the endwall with a short cylinder in the crossflow. From their research, the step-induced vortices interacted with the separated shear layer and horseshoe vortices by using stepped-diameter circular cylinder.…”

Section: Introductionmentioning

confidence: 99%

Flow pattern and heat transfer past two tandem arranged cylinders with oscillating inlet velocity

Liu

Xie

Sundén

2017

Applied Thermal Engineering

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Unsteady laminar convective fluid flow and heat transfer past two cylinders in tandem arrangement is investigated. Besides forced mixing by the natural vortex streets, extra imposed oscillating inlet velocity are considered. The lift and drag coefficients and Strouhal number for a single cylinder and their dependence on Reynolds number are also provided to validate the calculations with previous experiments. Different frequencies and amplitudes of the oscillating flows are set as inlet boundary conditions. For the cycle effect, at some specified points of the cycle ratios, the heat transfer enhancement of the upstream cylinder and the downstream cylinder are relatively larger due to the combined-effect of the natural vortex streets and the imposed oscillating inlet flows. The interaction between the natural vortex streets and imposed oscillating inlet flow leads to non-regular shaped vortices with increased flow mixing. For the amplitude effect, Nusselt numbers of the two cylinders are both greatly increased with increased amplitude ratios. With increased amplitude ratios, the vortex street expands and vibrates in a larger region which leads to stronger flow mixing and higher heat transfer. Generally, oscillating inlet flows can efficiently increase the heat transfer of two cylinders in crossflow without increasing the flow rate of the coolants.

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Flow disturbances over heated indented surface cylinders arranged in a tandem

Farrokhi Derakhshandeh,

2024

Ocean Engineering

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Three-dimensional vortex flow near the endwall of a short cylinder in crossflow: Stepped-diameter circular cylinder

Cited by 3 publications

References 13 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

Flow pattern and heat transfer past two tandem arranged cylinders with oscillating inlet velocity

Flow disturbances over heated indented surface cylinders arranged in a tandem

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