Break-up Mechanisms and Conditions for Vapour Slugs Within Mini-Channels

Research output: Contribution to conferenceAbstract

Abstract

In the present investigation an enhanced Volume Of Fluid (VOF) based numerical simulation framework is applied for the conduction of parametric numerical simulations, aiming to investigate observed break-up phenomena of vapour slugs, within circular mini-channel branches of a hybrid thermosyphon / pulsating heat pipe device, during microgravity experiments. The simulation results identify three prevailing break-up regimes. The effect of fundamental controlling parameters in the resulting break-up characteristics is also examined. An entrainment of a liquid droplet at the trailing edge of the vapour slug, that is responsible for its subsequent “full” break-up, is identified from the simulations. Moreover, it is quite interesting that the value of the applied heat flux, does not seem to influence the break-up regime and its main characteristics.
Original languageEnglish
Pages0-0
Number of pages1
Publication statusPublished - 4 Sep 2017
EventProceedings of the 15th UK Heat Transfer Conference, UKHTC2017 - Brunel University London, 4-5 September 2017
Duration: 4 Sep 2017 → …

Conference

ConferenceProceedings of the 15th UK Heat Transfer Conference, UKHTC2017
Period4/09/17 → …

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vapors
simulation
thermosiphons
heat pipes
trailing edges
entrainment
microgravity
heat flux
conduction
fluids
liquids

Cite this

Andredaki, M., Georgoulas, A., Miche, N., & Marengo, M. (2017). Break-up Mechanisms and Conditions for Vapour Slugs Within Mini-Channels. 0-0. Abstract from Proceedings of the 15th UK Heat Transfer Conference, UKHTC2017, .
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title = "Break-up Mechanisms and Conditions for Vapour Slugs Within Mini-Channels",
abstract = "In the present investigation an enhanced Volume Of Fluid (VOF) based numerical simulation framework is applied for the conduction of parametric numerical simulations, aiming to investigate observed break-up phenomena of vapour slugs, within circular mini-channel branches of a hybrid thermosyphon / pulsating heat pipe device, during microgravity experiments. The simulation results identify three prevailing break-up regimes. The effect of fundamental controlling parameters in the resulting break-up characteristics is also examined. An entrainment of a liquid droplet at the trailing edge of the vapour slug, that is responsible for its subsequent “full” break-up, is identified from the simulations. Moreover, it is quite interesting that the value of the applied heat flux, does not seem to influence the break-up regime and its main characteristics.",
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year = "2017",
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note = "Proceedings of the 15th UK Heat Transfer Conference, UKHTC2017 ; Conference date: 04-09-2017",

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Andredaki, M, Georgoulas, A, Miche, N & Marengo, M 2017, 'Break-up Mechanisms and Conditions for Vapour Slugs Within Mini-Channels' Proceedings of the 15th UK Heat Transfer Conference, UKHTC2017, 4/09/17, pp. 0-0.

Break-up Mechanisms and Conditions for Vapour Slugs Within Mini-Channels. / Andredaki, Manolia; Georgoulas, Anastasios; Miche, Nicolas; Marengo, Marco.

2017. 0-0 Abstract from Proceedings of the 15th UK Heat Transfer Conference, UKHTC2017, .

Research output: Contribution to conferenceAbstract

TY - CONF

T1 - Break-up Mechanisms and Conditions for Vapour Slugs Within Mini-Channels

AU - Andredaki, Manolia

AU - Georgoulas, Anastasios

AU - Miche, Nicolas

AU - Marengo, Marco

PY - 2017/9/4

Y1 - 2017/9/4

N2 - In the present investigation an enhanced Volume Of Fluid (VOF) based numerical simulation framework is applied for the conduction of parametric numerical simulations, aiming to investigate observed break-up phenomena of vapour slugs, within circular mini-channel branches of a hybrid thermosyphon / pulsating heat pipe device, during microgravity experiments. The simulation results identify three prevailing break-up regimes. The effect of fundamental controlling parameters in the resulting break-up characteristics is also examined. An entrainment of a liquid droplet at the trailing edge of the vapour slug, that is responsible for its subsequent “full” break-up, is identified from the simulations. Moreover, it is quite interesting that the value of the applied heat flux, does not seem to influence the break-up regime and its main characteristics.

AB - In the present investigation an enhanced Volume Of Fluid (VOF) based numerical simulation framework is applied for the conduction of parametric numerical simulations, aiming to investigate observed break-up phenomena of vapour slugs, within circular mini-channel branches of a hybrid thermosyphon / pulsating heat pipe device, during microgravity experiments. The simulation results identify three prevailing break-up regimes. The effect of fundamental controlling parameters in the resulting break-up characteristics is also examined. An entrainment of a liquid droplet at the trailing edge of the vapour slug, that is responsible for its subsequent “full” break-up, is identified from the simulations. Moreover, it is quite interesting that the value of the applied heat flux, does not seem to influence the break-up regime and its main characteristics.

M3 - Abstract

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Andredaki M, Georgoulas A, Miche N, Marengo M. Break-up Mechanisms and Conditions for Vapour Slugs Within Mini-Channels. 2017. Abstract from Proceedings of the 15th UK Heat Transfer Conference, UKHTC2017, .