Bubble Motion and Pressure Fluctuation in Microbubble Emission Boiling from a Vertical Surface

Bubble Motion and Pressure Fluctuation in Microbubble Emission Boiling from a Vertical Surface

High heat flux far exceeding CHF in microbubble emission boiling (MEB) should be considered a result of violent growing and collapsing behavior of coalescent bubbles in that regime, which introduces subcooled liquid to the surface to make steady solid-liquid contact even in the high surface temperat...

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Veröffentlicht in:Nihon Kikai Gakkai rombunshuu. B hen 1999/04/25, Vol.65(632), pp.1383-1388
Hauptverfasser: KUMAGAI, Satoshi, KAWABATA, Kazunori, YOSHIKAWA, Hiroyuki, SHIMADA, Ryohachi
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Sprache:eng ; jpn
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Parallel Flow
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container_end_page 1388
container_issue 632
container_start_page 1383
container_title Nihon Kikai Gakkai rombunshuu. B hen
container_volume 65
creator KUMAGAI, Satoshi
KAWABATA, Kazunori
YOSHIKAWA, Hiroyuki
SHIMADA, Ryohachi
description High heat flux far exceeding CHF in microbubble emission boiling (MEB) should be considered a result of violent growing and collapsing behavior of coalescent bubbles in that regime, which introduces subcooled liquid to the surface to make steady solid-liquid contact even in the high surface temperature region. This bubble behavior generates a moment of high pressure in the vicinity of the surface. In this study, a measurement of the pressure fluctuation in the liquid near the surface was performed synchronously with a recording of the bubble motion by a high speed video camera. The experimental results reveal that the peak value of the pressure fluctuation corresponds to the bubble collapse. The image processing method was also applied to the video pictures to analyze the bubble motion and some information was obtained.
doi_str_mv 10.1299/kikaib.65.1383
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language eng ; jpn
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subjects Parallel Flow
title Bubble Motion and Pressure Fluctuation in Microbubble Emission Boiling from a Vertical Surface
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