Experimental Investigation of the Effect of Flow Blockages on Heat Transfer and Fluid Friction in a Round Tube Using Wall-Attached Circular Rings

Patil, Adhikrao S.; Kore, Sandeep S.; Sane, N. K.

doi:10.1615/heattransres.2018025424

Cited by 7 publications

(2 citation statements)

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“…Depth of dimple influence on a surfaces local environment aspect ratio, and flow structure all acting together, Nusselt number distributions, Nusselt number distributions alone, and flow structure resulting from dimple depressions on a channel surface [2,3,7]. Patil et al, [10] and Yadav et al, [11] investigated heat exchanger tube for different flow blockages with wall attached circular ring turbulator and twisted tape with Fe3O4 nanofluid.…”

Section: Introductionmentioning

confidence: 99%

The Heat Transfer and Fluid Flow Investigations of Single Dimple with Straight and Curved Arch Turbulator within in a Duct

Sandeep Sadashiv Kore,

Manoj Kumar Chaudhary,

Parimal Sharad Bhambare

et al. 2024

ARFMTS

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An experimental study was conducted to examine the impact of a single dimple with an arch-type turbulator on heat transfer and fluid friction. The square duct has a 4:1 aspect ratio. Reynolds numbers range from 10,000 to 35,000 depending on hydraulic diameter, maintaining as 0.5 aspect ratio between duct height and dimple diameter. Dimple depth to print diameter ratio is 0.3, which is maintained constant. Two different types of arch turbulators are tested in the first half of the dimple to improve the fluid velocities and heat transfer. The turbulators used in the investigations are both curved and straight type. Curved arch turbulators included angles are 45°, 60°, or 90°, whereas straight arch turbulators are inclined to the surface at a 12° angle. At the dimple's leading edge, an arch turbulator is installed. The experimental findings are displayed as Nusselt number, normalized Nusselt number, friction factor, normalized friction factor, and thermal performance. According to the experimental findings, turbulators with a 60° curved arch operate better than those with 45° and 90° curved arches. Compared to all other arch turbulators, the straight arch turbulator achieves the highest thermal performance.

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Section: Introductionmentioning

confidence: 99%

The Heat Transfer and Fluid Flow Investigations of Single Dimple with Straight and Curved Arch Turbulator within in a Duct

Sandeep Sadashiv Kore,

Manoj Kumar Chaudhary,

Parimal Sharad Bhambare

et al. 2024

ARFMTS

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“…To experimental results and numerical data for numerous heats transfer enhancement techniques have been proposed and presented. Among them are twisted tape [3,4], circular ring turbulator [4][5][6][7], conical shaped geometry [8][9], conical rings [10], Vnozzle [11], diamond-shape tabulators [11], The investigation of several inserts with diverse configurations of shape and geometry such as perforated circular ring [12][13][14][15][16], The effects of conicalnozzle form ring inserts on factors related to friction and heat transfer were investigated in a circular tube with convergent and divergent nozzle configurations. The pressure surge is significantly reduced with increasing porosity [17][18].…”

Section: Introductionmentioning

confidence: 99%

Computational Study and Enhancement of Heat Transfer Rate by Using Inserts Introduced in a Heat Exchanger

Kore

Chaudhary²,

Patil³

et al. 2023

ARFMTS

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The research provides a numerical and computational analysis of improving heat transfer rate in heat exchangers employing obstructing geometries such as Circular Ring, Circular Ring with` clearance, and Hexagonal ring tabulators with different pitch diameter ratios (PDR). All geometries were evaluated with flow obstruction areas of 0.3, 0.4, and 0.5. Flow obstruction area and Reynolds number were the variables that changed during the testing. The pitch diameter ratio employed in the investigation is one. The Reynolds number was changed between 6000 and 21000. For numerical examination, k--ε technique was used in this study. The use of flow obstruction geometry as a turbulator improves heat transmission derived from the hot surface of the pipe to the air throughout the test region substantially. In this research work, the tested designs, a circular ring separated from the tube wall and a hexagonal ring with the same flow blockage area improve heat transmission. Hexagonal rings incur a lower fluid friction cost than circular rings and circular rings with clearance. The maximal heat transfer enhancement (Nut/Nup) for the diameter ratio of the insert of 0.6.3 is 2.28–3.01.

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Enhanced thermal performance in tubular heat exchanger contained with V-shaped baffles

Promvonge

Skullong

2021

Applied Thermal Engineering

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Experimental Investigation of the Effect of Flow Blockages on Heat Transfer and Fluid Friction in a Round Tube Using Wall-Attached Circular Rings

Cited by 7 publications

References 0 publications

The Heat Transfer and Fluid Flow Investigations of Single Dimple with Straight and Curved Arch Turbulator within in a Duct

The Heat Transfer and Fluid Flow Investigations of Single Dimple with Straight and Curved Arch Turbulator within in a Duct

Computational Study and Enhancement of Heat Transfer Rate by Using Inserts Introduced in a Heat Exchanger

Enhanced thermal performance in tubular heat exchanger contained with V-shaped baffles

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