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Cylindrical liquid-liquid jet instab...

Tang, Liujuan.

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Cylindrical liquid-liquid jet instability.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Cylindrical liquid-liquid jet instability./
作者:	Tang, Liujuan.
面頁冊數:	300 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-07, Section: B, page: 3644.
Contained By:	Dissertation Abstracts International65-07B.
標題:	Engineering, Marine and Ocean. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3139785
ISBN:	0496869264

Cylindrical liquid-liquid jet instability.
Tang, Liujuan.

Cylindrical liquid-liquid jet instability. - 300 p.

Source: Dissertation Abstracts International, Volume: 65-07, Section: B, page: 3644.

Thesis (Ph.D.)--University of Hawai'i, 2004.

Experiments were conducted to investigate the breakup of liquid jets discharging into another liquid over the full range of instabilities extending from disintegration of laminar jets to turbulent atomization. The present study focused upon elucidating the fundamental mechanisms and parameters that control jet breakup; identifying liquid-liquid jet instability regimes and determining the boundaries of these regimes; and securing quantitative data on droplet size spectra that could provide insight into the breakup phenomena and which could be applied to the development and testing of models.

ISBN: 0496869264Subjects--Topical Terms:

1019064
Engineering, Marine and Ocean.

Cylindrical liquid-liquid jet instability.
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245 1 0 $a Cylindrical liquid-liquid jet instability.
300 $a 300 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-07, Section: B, page: 3644.
500 $a Chair: Stephen M. Masutani.
502 $a Thesis (Ph.D.)--University of Hawai'i, 2004.
520 $a Experiments were conducted to investigate the breakup of liquid jets discharging into another liquid over the full range of instabilities extending from disintegration of laminar jets to turbulent atomization. The present study focused upon elucidating the fundamental mechanisms and parameters that control jet breakup; identifying liquid-liquid jet instability regimes and determining the boundaries of these regimes; and securing quantitative data on droplet size spectra that could provide insight into the breakup phenomena and which could be applied to the development and testing of models.
520 $a The experiments were conducted in several facilities. Jet fluids including four deepwater crude oils, two silicone fluids, and liquid CO2 with very different properties were injected into tap water, natural seawater or synthetic seawater over a range of flow rates, temperatures, and pressures from a variety of injection nozzles. The independent parameters of the tests were: (1) jet velocity; (2) jet and ambient fluid properties; and (3) injector diameter and geometry. Flow visualization and Phase Doppler particle analysis were the primary measurement techniques.
520 $a Major results and conclusions of this study include: (1) Five instability regimes were identified by a comprehensive review of the digital video records of the 294 test runs. (2) A linear regression to the data yielded relationships for the boundaries between the five instability regimes in dimensionless Ohnesorge Number and jet Reynolds Number space. It was determined that the transition between regimes is independent of jet viscosity and the relationships for the boundaries can be written as Weber Number &sim; constant. Critical transitional Weber numbers were identified. (3) The dependence of jet breakup length on jet viscosity, ambient fluid properties, and orifice geometry was investigated. (4) Droplet size spectra were measured for liquid-liquid jet disintegration over the full range of instabilities from capillary to turbulent breakup. Over the range of conditions examined in this study, jet velocity, orifice size and geometry, and jet fluid viscosity were observed to affect droplet size. A novel weighted multimodal distribution concept was developed to obtain functional representations of the experimental size distributions (both PDFs and CDFs) that can be applied for model development and testing.
590 $a School code: 0085.
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791 $a Ph.D.
792 $a 2004
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