Natural Convection Heat Transfer From a Short or Long, Solid or Hollow Horizontal Cylinder Suspended in Air or Placed on Ground

Acharya, Swastik; Dash, Sukanta Kumar

doi:10.1115/1.4035919

Cited by 39 publications

(16 citation statements)

References 31 publications

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“…Herraez did not calculate the heat transfer at the bottom of the cylinder circumference, resulting in a significant deviation from the current article. The values obtained by Morgan, Acharya et al, Zhu et al, and Sheremet fall within a deviation of ±10% with respect to this study. The current experimental result is very close to that obtained by Morgan.…”

Section: Heat Transfer Analysissupporting

confidence: 89%

“…Comparison of the thermal plume with the previous result: A, The numerically calculated temperature contours reported in Acharya et al; B, The experimental result in current article [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Visualization Resultsmentioning

confidence: 73%

“…Figure shows the experimental fringe pattern in current article (right side) compared with the numerically calculated temperature contours (left side) reported in Acharys et al The air was heated by the cylinder, and then heat transfer occurred around the cylinder. The heated air moved upward because of the buoyancy effect.…”

Section: Visualization Resultsmentioning

confidence: 74%

“…To estimate the temperature gradient near the cylinder wall, the radial distance of a bright fringe adjacent to the cylinder wall was considered r = 0 mm, indicated by a purple circle in Figure 2A. Figure 3 shows the experimental fringe pattern in current article (right side) compared with the numerically calculated temperature contours (left side) reported in Acharys et al 11 The air was heated by the cylinder, and then heat transfer occurred around the cylinder. The heated air moved upward because of the buoyancy effect.…”

Section: Holographic Interferograms Outputmentioning

confidence: 95%

“…As shown in Figure , the results are compared with those obtained using correlation equations proposed in previous studies (as listed in Table ).…”

Section: Heat Transfer Analysismentioning

confidence: 99%

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Natural convection heat transfer from a horizontal cylinder using holographic interferometry

Zhu

Zhang

et al. 2018

Heat Trans. Asian Res.

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The natural convection heat transfer from a horizontal cylinder with a uniform wall temperature in an infinite space was experimentally investigated. Infinite fringe interferograms of the cylinder heated from 295.15 to 355.15 K were recorded using the holographic interferometry technique. The temperature field around the cylinder was reconstructed based on phase difference recovery using a MATLAB code. The distributions of the local and average Nusselt numbers over the cylinder were then obtained. A correlation of the average Nusselt number was proposed for a Rayleigh number range of 2.7–6.0 × 104. The experimental results are in good agreement with previous correlations, with a deviation of ±10%. The holographic interferometry technique was found to be satisfactory and reliable for heat transfer analyses.

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Section: Heat Transfer Analysissupporting

confidence: 89%

Section: Visualization Resultsmentioning

confidence: 73%

Section: Visualization Resultsmentioning

confidence: 74%

Section: Holographic Interferograms Outputmentioning

confidence: 95%

“…As shown in Figure , the results are compared with those obtained using correlation equations proposed in previous studies (as listed in Table ).…”

Section: Heat Transfer Analysismentioning

confidence: 99%

See 3 more Smart Citations

Natural convection heat transfer from a horizontal cylinder using holographic interferometry

Zhu

Zhang

et al. 2018

Heat Trans. Asian Res.

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Design of Vacuum Post‐Drying Procedures for Electrodes of Lithium‐Ion Batteries

Huttner

Marth

Eser

et al. 2021

Batteries & Supercaps

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In order to reduce the residual moisture in lithium‐ion batteries, electrodes and separators need to be post‐dried prior to cell assembly. On an industrial scale, this is often conducted batch‐wise in vacuum ovens for larger electrode and separator coils. Especially for electrodes, the corresponding post‐drying parameters have to be carefully chosen to sufficiently reduce the moisture without damaging the sensitive microstructure. This requires a fundamental understanding of structural limitations as well as heat transfer and water mass transport in coils. The aim of this study is to establish a general understanding of the vacuum post‐drying process of coils. Moreover, the targeted design of efficient, well‐adjusted and application‐oriented vacuum post‐drying procedures for electrode coils on the basis of modelling is employed, while keeping the post‐drying intensity as low as possible, in order to maintain the sensitive microstructure and to save time and costs. In this way, a comparatively short and moderate 2‐phase vacuum post‐drying procedure is successfully designed and practically applied. The results show that the designed procedure is able to significantly reduce the residual moisture of anode and cathode coils, even with greater electrode lengths and coating widths, without deteriorating the sensitive microstructure of the electrodes.

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Study of combined effect of natural convection and radiation heat transfer from annular finned vertical cylinder

et al. 2022

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The present numerical study reports the combined effect of natural convection and radiation heat from a vertical cylinder with annular fins. The study involves simulation for laminar as well as turbulent regimes. For the present study, Rayleigh's number is varied in the range 108−1012, emissivity in the range 0.2−0.8, and the fin spacing ratio (s/d) in the range 0.1−10. The radiation heat transfer has been found to share a considerable amount in the total heat transfer of the system for the laminar regime, but in the turbulent regime, its effect is minimal and can be neglected. When the fin spacing ratio is reduced, the total heat transfer increases for both the turbulent and laminar flow conditions. But the radiation heat increases with a reduction in fin spacing ratio for laminar and in case of turbulent flow radiation heat rate reduces with a reduction in s/d ratio. For the range of Rayleigh numbers considered in the present study, the Nusselt number increases with the increment of the fin spacing ratio. Thus, it can be concluded that there is a remarkable enhancement in the heat transfer rate in laminar cases with the fins. For turbulent cases, the fin efficiency lies between 40% and 50%.

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Natural Convection Heat Transfer From a Short or Long, Solid or Hollow Horizontal Cylinder Suspended in Air or Placed on Ground

Cited by 39 publications

References 31 publications

Natural convection heat transfer from a horizontal cylinder using holographic interferometry

Natural convection heat transfer from a horizontal cylinder using holographic interferometry

Design of Vacuum Post‐Drying Procedures for Electrodes of Lithium‐Ion Batteries

Study of combined effect of natural convection and radiation heat transfer from annular finned vertical cylinder

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