Heat Transfer Reduction due to a Ceiling-Mounted Barrier in an Enclosure with Natural Convection

İliş, Gamze Gediz; Mobedi, Moghtada; Öztop, Hakan F.

doi:10.1080/01457632.2010.483889

Cited by 17 publications

(6 citation statements)

References 39 publications

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“…Mahapatra et al [30] discovered the opposite combined convective stream in a partitioned box with two partitions attached in the bottom and top walls. Ilis et al [31] numerically explored the ceiling-mounted baffle on buoyant convection in a box. Khatamifar et al [32] inspected conjugate convective current in a box separated by a divider.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Mixed Convection Flow and Energy Transfer in an Inclined Channel Cavity: Effect of Baffle Size

Sivasankaran

Janagi

2022

MCA

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The objective of the current numerical study is to explore the combined natural and forced convection and energy transport in a channel with an open cavity. An adiabatic baffle of finite length is attached to the top wall. The sinusoidal heating is implemented on the lower horizontal wall of the open cavity. The other areas of the channel cavity are treated as adiabatic. The governing equations are solved by the control volume technique for various values of relevant factors. The drag force, bulk temperature and average Nusselt number are computed. It is recognised that recirculating eddies beside the baffle become weak or disappear upon increasing the inclination angle of the channel/cavity. The average thermal energy transportation reduces steadily until the Ri = 1 and then it rises for all inclination angles and lengths of the baffle.

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Section: Introductionmentioning

confidence: 99%

Numerical Study on Mixed Convection Flow and Energy Transfer in an Inclined Channel Cavity: Effect of Baffle Size

Sivasankaran

Janagi

2022

MCA

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“…Numerous studies have investigated the impact of fins in enclosures with a temperature gradient between the vertical walls along with the insulated top and bottom surfaces. Examples include: a single fin on the hot wall [15][16][17][18], a single fin on the insulated top wall [19], a single fin attached to either vertical (hot) or bottom (insulated) wall [20]. In contrast to these studies with laterally heated cavities, however, the research on augmentation or suppression of heat transfer in RB convection through fins is relatively limited.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fin Orientation and Length on the Rayleigh-Benard Convection

Selamet¹,

Selamet²,

Dehner³

2017

JEPE

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Natural convection driven by the temperature difference of horizontal top and bottom surfaces of an enclosure containing air, Pr = 0.7, and fins of different arrangements at different lengths is studied numerically for Ra = 10 5 and 5 × 10 5 . Evolution of heat transfer rates (Nusselt number) is illustrated along with various, steady or unsteady, cellular flow structures and temperature patterns. The effect of fin length and placement on flow regime and heat transfer is established. Different fin orientations at the walls are observed to introduce considerable unsteadiness in some cases, requiring close investigation in order to design systems for specific purposes.

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“…It also revealed that the recirculation flow structure within the container significantly relies on the position and length of extended partitions. Ilis et al (2011) have discussed free convection in baffled square enclosures. In their work, the insulated baffle is located on the adiabatic top wall.…”

Section: Introductionmentioning

confidence: 99%

Impact of periodic magnetic source on natural convection and entropy generation of ferrofluids in a baffled cavity

Zontul

Hamzah

Şahi̇n

2021

HFF

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Purpose This paper aims to exhibit a numerical study to analyze the influence of a periodic magnetic source on free convection flow and entropy generation of a ferrofluid in a baffled cavity. In this study, ferrofluid nanofluid was selected due to its ability to image magnetic domain structures within the cavity. The non-uniform magnetic source is considered as a sinusoidal distribution in the vertical direction. Design/methodology/approach The finite volume technique is used to evaluate the steady two-dimensional partial differential equations that govern the flow with its corresponding boundary conditions. Findings The obtained results indicate that a significant increase in the average Nusselt number can be achieved with the use of the periodic magnetic source instead of a uniform case. In addition, the effectiveness of the adiabatic baffle notably depends on its position and Rayleigh number. Regardless of the values of period and Hartmann numbers, the periodic magnetic source has a higher entropy generation and lower Bejan number than the uniform magnetic source. Originality/value The novelty of this research lies in applying a periodic magnetic source on the natural convection of ferrofluids in a baffled cavity.

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Heat Transfer Reduction due to a Ceiling-Mounted Barrier in an Enclosure with Natural Convection

Abstract: Effects of a ceiling-mounted barrier on natural convection heat transfer in

Cited by 17 publications

References 39 publications

Numerical Study on Mixed Convection Flow and Energy Transfer in an Inclined Channel Cavity: Effect of Baffle Size

Numerical Study on Mixed Convection Flow and Energy Transfer in an Inclined Channel Cavity: Effect of Baffle Size

Effect of Fin Orientation and Length on the Rayleigh-Benard Convection

Impact of periodic magnetic source on natural convection and entropy generation of ferrofluids in a baffled cavity

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