The onset of oblique vortex shedding behind a heated circular cylinder in laminar wake regime

Ming Hsun Wu; Zdenǎk Trávníček; An Bang Wang

doi:10.1063/1.3675551

The onset of oblique vortex shedding behind a heated circular cylinder in laminar wake regime

Ming Hsun Wu, Zdenǎk Trávníček, An Bang Wang

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Oblique vortex shedding (OVS) behind a heated circular cylinder in air was experimentally investigated. Similar to that in the parallel vortex shedding (PVS), the results show that the non-dimensionalized shedding frequency, Strouhal number, decreases under the influence of cylinder heating for oblique shedding mode. Although the onset Reynolds number of OVS increases with the cylinder temperature, the onset effective Reynolds number remains 63.3 ± 1.3 regardless of the cylinder heating. A general Strouhal-Reynolds-number relationship for OVS has been found based on the effective temperature concept in the present study. The ratio of the critical Reynolds numbers for the onsets of OVS and PVS is found to be an invariant with value of 4/3 for both isothermal and non-isothermal cases despite different length/diameter ratios and end conditions.

Original language	English
Article number	011701
Journal	Physics of Fluids
Volume	24
Issue number	1
DOIs	https://doi.org/10.1063/1.3675551
Publication status	Published - 2012 Jan 5

All Science Journal Classification (ASJC) codes

Computational Mechanics
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Fluid Flow and Transfer Processes

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title = "The onset of oblique vortex shedding behind a heated circular cylinder in laminar wake regime",

abstract = "Oblique vortex shedding (OVS) behind a heated circular cylinder in air was experimentally investigated. Similar to that in the parallel vortex shedding (PVS), the results show that the non-dimensionalized shedding frequency, Strouhal number, decreases under the influence of cylinder heating for oblique shedding mode. Although the onset Reynolds number of OVS increases with the cylinder temperature, the onset effective Reynolds number remains 63.3 ± 1.3 regardless of the cylinder heating. A general Strouhal-Reynolds-number relationship for OVS has been found based on the effective temperature concept in the present study. The ratio of the critical Reynolds numbers for the onsets of OVS and PVS is found to be an invariant with value of 4/3 for both isothermal and non-isothermal cases despite different length/diameter ratios and end conditions.",

author = "Wu, {Ming Hsun} and Zdenǎk Tr{\'a}vn{\'i}{\v c}ek and Wang, {An Bang}",

note = "Funding Information: We gratefully acknowledge the financial supports from the National Science Council, Taiwan and the GACR—Czech Science Foundation (Taiwanese and Czech parts of the joint project No. NSC 100-2923-E-002-002-MY3 and P101/11/J019), and the research plan AV0Z20760514. Ming-Hsun Wu would also like to thank the support from Research Center for Energy Technology and Strategy of National Cheng Kung University.",

year = "2012",

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doi = "10.1063/1.3675551",

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T1 - The onset of oblique vortex shedding behind a heated circular cylinder in laminar wake regime

AU - Wu, Ming Hsun

AU - Trávníček, Zdenǎk

AU - Wang, An Bang

N1 - Funding Information: We gratefully acknowledge the financial supports from the National Science Council, Taiwan and the GACR—Czech Science Foundation (Taiwanese and Czech parts of the joint project No. NSC 100-2923-E-002-002-MY3 and P101/11/J019), and the research plan AV0Z20760514. Ming-Hsun Wu would also like to thank the support from Research Center for Energy Technology and Strategy of National Cheng Kung University.

PY - 2012/1/5

Y1 - 2012/1/5

N2 - Oblique vortex shedding (OVS) behind a heated circular cylinder in air was experimentally investigated. Similar to that in the parallel vortex shedding (PVS), the results show that the non-dimensionalized shedding frequency, Strouhal number, decreases under the influence of cylinder heating for oblique shedding mode. Although the onset Reynolds number of OVS increases with the cylinder temperature, the onset effective Reynolds number remains 63.3 ± 1.3 regardless of the cylinder heating. A general Strouhal-Reynolds-number relationship for OVS has been found based on the effective temperature concept in the present study. The ratio of the critical Reynolds numbers for the onsets of OVS and PVS is found to be an invariant with value of 4/3 for both isothermal and non-isothermal cases despite different length/diameter ratios and end conditions.

AB - Oblique vortex shedding (OVS) behind a heated circular cylinder in air was experimentally investigated. Similar to that in the parallel vortex shedding (PVS), the results show that the non-dimensionalized shedding frequency, Strouhal number, decreases under the influence of cylinder heating for oblique shedding mode. Although the onset Reynolds number of OVS increases with the cylinder temperature, the onset effective Reynolds number remains 63.3 ± 1.3 regardless of the cylinder heating. A general Strouhal-Reynolds-number relationship for OVS has been found based on the effective temperature concept in the present study. The ratio of the critical Reynolds numbers for the onsets of OVS and PVS is found to be an invariant with value of 4/3 for both isothermal and non-isothermal cases despite different length/diameter ratios and end conditions.

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The onset of oblique vortex shedding behind a heated circular cylinder in laminar wake regime

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