Study of disturbance wave development in downwards annular flows with a moving frame-of-reference brightness-based laser-induced fluorescence method

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Study of disturbance wave development in downwards annular flows with a moving frame-of-reference brightness-based laser-induced fluorescence method. / An, Jae Sik; Cherdantsev, Andrey V.; Zadrazil, Ivan et al.

In: Experiments in Fluids, Vol. 61, No. 7, 169, 01.07.2020.

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

BibTeX

@article{0000f8f4521645d6936673e5040dff0e,

title = "Study of disturbance wave development in downwards annular flows with a moving frame-of-reference brightness-based laser-induced fluorescence method",

abstract = "A novel moving frame-of-reference brightness-based laser-induced fluorescence (MFoR-BBLIF) method was developed and demonstrated in downwards co-current air–water annular flows. The method was applied to study the downstream development of individual disturbance waves in flows over a range of conditions (ReL = 276–1321, ReG = 39,500–79,000). In this method, the optical measurement system, and hence, the region of interrogation (ROI) was translated physically along the length of the test-section with a velocity close to that of individual disturbance waves to obtain the velocities of individual disturbance-waves as a function of downstream distance from the inlet. It was found that the velocities of individual disturbance waves increase with both downstream distance and gas–liquid flow conditions. In addition, the variation in the wave velocities was more significant at higher gas and liquid Reynolds numbers. The approach can be integrated with many other contactless measurement methods, and can also be used over a range of translation speeds (not necessarily in a “Lagrangian” manner) to study the evolution of important advecting flow phenomena.",

keywords = "FILM",

author = "An, {Jae Sik} and Cherdantsev, {Andrey V.} and Ivan Zadrazil and Markides, {Christos N.}",

note = "Publisher Copyright: {\textcopyright} 2020, The Author(s).",

year = "2020",

month = jul,

day = "1",

doi = "10.1007/s00348-020-03001-w",

language = "English",

volume = "61",

journal = "Experiments in Fluids",

issn = "0723-4864",

publisher = "Springer-Verlag GmbH and Co. KG",

number = "7",

}

RIS

TY - JOUR

T1 - Study of disturbance wave development in downwards annular flows with a moving frame-of-reference brightness-based laser-induced fluorescence method

AU - An, Jae Sik

AU - Cherdantsev, Andrey V.

AU - Zadrazil, Ivan

AU - Markides, Christos N.

PY - 2020/7/1

Y1 - 2020/7/1

N2 - A novel moving frame-of-reference brightness-based laser-induced fluorescence (MFoR-BBLIF) method was developed and demonstrated in downwards co-current air–water annular flows. The method was applied to study the downstream development of individual disturbance waves in flows over a range of conditions (ReL = 276–1321, ReG = 39,500–79,000). In this method, the optical measurement system, and hence, the region of interrogation (ROI) was translated physically along the length of the test-section with a velocity close to that of individual disturbance waves to obtain the velocities of individual disturbance-waves as a function of downstream distance from the inlet. It was found that the velocities of individual disturbance waves increase with both downstream distance and gas–liquid flow conditions. In addition, the variation in the wave velocities was more significant at higher gas and liquid Reynolds numbers. The approach can be integrated with many other contactless measurement methods, and can also be used over a range of translation speeds (not necessarily in a “Lagrangian” manner) to study the evolution of important advecting flow phenomena.

AB - A novel moving frame-of-reference brightness-based laser-induced fluorescence (MFoR-BBLIF) method was developed and demonstrated in downwards co-current air–water annular flows. The method was applied to study the downstream development of individual disturbance waves in flows over a range of conditions (ReL = 276–1321, ReG = 39,500–79,000). In this method, the optical measurement system, and hence, the region of interrogation (ROI) was translated physically along the length of the test-section with a velocity close to that of individual disturbance waves to obtain the velocities of individual disturbance-waves as a function of downstream distance from the inlet. It was found that the velocities of individual disturbance waves increase with both downstream distance and gas–liquid flow conditions. In addition, the variation in the wave velocities was more significant at higher gas and liquid Reynolds numbers. The approach can be integrated with many other contactless measurement methods, and can also be used over a range of translation speeds (not necessarily in a “Lagrangian” manner) to study the evolution of important advecting flow phenomena.

KW - FILM

UR - http://www.scopus.com/inward/record.url?scp=85087439266&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/09f3bc21-1da5-33c0-ab7b-95d25df12e3f/

U2 - 10.1007/s00348-020-03001-w

DO - 10.1007/s00348-020-03001-w

M3 - Article

AN - SCOPUS:85087439266

VL - 61

JO - Experiments in Fluids

JF - Experiments in Fluids

SN - 0723-4864

IS - 7

M1 - 169

ER -

ID: 24720036