Bubble behavior in horizontal two-phase flow under flow rate fluctuation

The study is one on the series of the study on two-phase flow under earthquake, in which the two-phase flow behavior under the seismic vibration is systematically investigated by using both an experimental method and a numerical situation. The present study focuses on a bubbly flow behavior in a hor...

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Autores principales:	Jun-ichi TAKANO, Hideaki MONJI, Akiko KANEKO, Yutaka ABE, Hiroyuki YOSHIDA, Kazuyuki TAKASE
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2014
Materias:	earthquake bubbly flow flow rate fluctuation piv tpfit Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/2b452eb3919f4b6db244b7c77607e455
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spelling	oai:doaj.org-article:2b452eb3919f4b6db244b7c77607e4552021-11-26T06:09:52ZBubble behavior in horizontal two-phase flow under flow rate fluctuation2187-974510.1299/mej.2014tep0019https://doaj.org/article/2b452eb3919f4b6db244b7c77607e4552014-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/1/4/1_2014tep0019/_pdf/-char/enhttps://doaj.org/toc/2187-9745The study is one on the series of the study on two-phase flow under earthquake, in which the two-phase flow behavior under the seismic vibration is systematically investigated by using both an experimental method and a numerical situation. The present study focuses on a bubbly flow behavior in a horizontal pipe under flow rate fluctuations. The periodical flow rate fluctuation was added to the bubbly or plug flow in a horizontal pipe, and the flow behavior was mainly measured by using image processing and PIV (particle image velocimetry). In the result of the image processing, the characteristic bubble deformation near the pipe wall was observed and the bubble deformation was synchronized with the flow rate fluctuation. The velocity field obtained by PIV showed the characteristic shear flow under the deformed bubble. The motion of both the liquid and the bubble responded to the pressure gradient fluctuation under the flow rate fluctuation, but the response of the bubble motion to the pressure gradient was slightly faster than that of the liquid motion. It indicated that the relative velocity between the bubble and the liquid changed with time. Therefore, the shear flow under the bubble was caused by the relative velocity between the bubble and the liquid, and the bubble was deformed by the shear flow due to the flow rate fluctuation. The numerical simulation code for the gas-liquid two-phase flow with an advanced interface tracking method, TPFIT, also showed the same mechanism of the bubble deformation, i.e., the shear flow under the bubble caused by the flow rate fluctuation.Jun-ichi TAKANOHideaki MONJIAkiko KANEKOYutaka ABEHiroyuki YOSHIDAKazuyuki TAKASEThe Japan Society of Mechanical Engineersarticleearthquakebubbly flowflow rate fluctuationpivtpfitMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 1, Iss 4, Pp TEP0019-TEP0019 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	earthquake bubbly flow flow rate fluctuation piv tpfit Mechanical engineering and machinery TJ1-1570
spellingShingle	earthquake bubbly flow flow rate fluctuation piv tpfit Mechanical engineering and machinery TJ1-1570 Jun-ichi TAKANO Hideaki MONJI Akiko KANEKO Yutaka ABE Hiroyuki YOSHIDA Kazuyuki TAKASE Bubble behavior in horizontal two-phase flow under flow rate fluctuation
description	The study is one on the series of the study on two-phase flow under earthquake, in which the two-phase flow behavior under the seismic vibration is systematically investigated by using both an experimental method and a numerical situation. The present study focuses on a bubbly flow behavior in a horizontal pipe under flow rate fluctuations. The periodical flow rate fluctuation was added to the bubbly or plug flow in a horizontal pipe, and the flow behavior was mainly measured by using image processing and PIV (particle image velocimetry). In the result of the image processing, the characteristic bubble deformation near the pipe wall was observed and the bubble deformation was synchronized with the flow rate fluctuation. The velocity field obtained by PIV showed the characteristic shear flow under the deformed bubble. The motion of both the liquid and the bubble responded to the pressure gradient fluctuation under the flow rate fluctuation, but the response of the bubble motion to the pressure gradient was slightly faster than that of the liquid motion. It indicated that the relative velocity between the bubble and the liquid changed with time. Therefore, the shear flow under the bubble was caused by the relative velocity between the bubble and the liquid, and the bubble was deformed by the shear flow due to the flow rate fluctuation. The numerical simulation code for the gas-liquid two-phase flow with an advanced interface tracking method, TPFIT, also showed the same mechanism of the bubble deformation, i.e., the shear flow under the bubble caused by the flow rate fluctuation.
format	article
author	Jun-ichi TAKANO Hideaki MONJI Akiko KANEKO Yutaka ABE Hiroyuki YOSHIDA Kazuyuki TAKASE
author_facet	Jun-ichi TAKANO Hideaki MONJI Akiko KANEKO Yutaka ABE Hiroyuki YOSHIDA Kazuyuki TAKASE
author_sort	Jun-ichi TAKANO
title	Bubble behavior in horizontal two-phase flow under flow rate fluctuation
title_short	Bubble behavior in horizontal two-phase flow under flow rate fluctuation
title_full	Bubble behavior in horizontal two-phase flow under flow rate fluctuation
title_fullStr	Bubble behavior in horizontal two-phase flow under flow rate fluctuation
title_full_unstemmed	Bubble behavior in horizontal two-phase flow under flow rate fluctuation
title_sort	bubble behavior in horizontal two-phase flow under flow rate fluctuation
publisher	The Japan Society of Mechanical Engineers
publishDate	2014
url	https://doaj.org/article/2b452eb3919f4b6db244b7c77607e455
work_keys_str_mv	AT junichitakano bubblebehaviorinhorizontaltwophaseflowunderflowratefluctuation AT hideakimonji bubblebehaviorinhorizontaltwophaseflowunderflowratefluctuation AT akikokaneko bubblebehaviorinhorizontaltwophaseflowunderflowratefluctuation AT yutakaabe bubblebehaviorinhorizontaltwophaseflowunderflowratefluctuation AT hiroyukiyoshida bubblebehaviorinhorizontaltwophaseflowunderflowratefluctuation AT kazuyukitakase bubblebehaviorinhorizontaltwophaseflowunderflowratefluctuation
_version_	1718409769075605504

Bubble behavior in horizontal two-phase flow under flow rate fluctuation

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