Study on droplet entrainment of high-viscosity falling liquid film

Jun Inumaru; Maromu Ohtaka; Hiroaki Watanabe

doi:10.1299/kikaib.74.2279

Study on droplet entrainment of high-viscosity falling liquid film

Jun Inumaru, Maromu Ohtaka, Hiroaki Watanabe

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

1 Citation (Scopus)

Abstract

An experimental study of counter-current annular two-phase flow of high-viscosity liquid and air in a large diameter pipe was carried out to investigate the inception criterion for entrainment of molten slag droplet in an entrained flow coal gasifier. Liquid film thickness was measured using a high-speed camera for 4 types of liquid with various viscosities and surface tensions. It was clearly shown that the measured average wave amplitude had a good correlation with the gas Reynolds number, and that the predicted critical gas velocity for droplet inception using new formula of wave amplitude had a good agreement with the experimental results under the condition of very low fluid Reynolds number (Re_f≦10). The critical Weber number W _ec = 1.73 was obtained as inception criterion of droplet entrainment.

Original language	English
Pages (from-to)	2279-2286
Number of pages	8
Journal	Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume	74
Issue number	11
DOIs	https://doi.org/10.1299/kikaib.74.2279
Publication status	Published - Nov 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanical Engineering

Access to Document

10.1299/kikaib.74.2279

Cite this

@article{a86ee728adf241beb2a3b8969f20fb90,

title = "Study on droplet entrainment of high-viscosity falling liquid film",

abstract = "An experimental study of counter-current annular two-phase flow of high-viscosity liquid and air in a large diameter pipe was carried out to investigate the inception criterion for entrainment of molten slag droplet in an entrained flow coal gasifier. Liquid film thickness was measured using a high-speed camera for 4 types of liquid with various viscosities and surface tensions. It was clearly shown that the measured average wave amplitude had a good correlation with the gas Reynolds number, and that the predicted critical gas velocity for droplet inception using new formula of wave amplitude had a good agreement with the experimental results under the condition of very low fluid Reynolds number (Ref≦10). The critical Weber number W ec = 1.73 was obtained as inception criterion of droplet entrainment.",

author = "Jun Inumaru and Maromu Ohtaka and Hiroaki Watanabe",

year = "2008",

month = nov,

doi = "10.1299/kikaib.74.2279",

language = "English",

volume = "74",

pages = "2279--2286",

journal = "Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B",

issn = "0387-5016",

publisher = "The Japan Society of Mechanical Engineers",

number = "11",

}

TY - JOUR

T1 - Study on droplet entrainment of high-viscosity falling liquid film

AU - Inumaru, Jun

AU - Ohtaka, Maromu

AU - Watanabe, Hiroaki

PY - 2008/11

Y1 - 2008/11

N2 - An experimental study of counter-current annular two-phase flow of high-viscosity liquid and air in a large diameter pipe was carried out to investigate the inception criterion for entrainment of molten slag droplet in an entrained flow coal gasifier. Liquid film thickness was measured using a high-speed camera for 4 types of liquid with various viscosities and surface tensions. It was clearly shown that the measured average wave amplitude had a good correlation with the gas Reynolds number, and that the predicted critical gas velocity for droplet inception using new formula of wave amplitude had a good agreement with the experimental results under the condition of very low fluid Reynolds number (Ref≦10). The critical Weber number W ec = 1.73 was obtained as inception criterion of droplet entrainment.

AB - An experimental study of counter-current annular two-phase flow of high-viscosity liquid and air in a large diameter pipe was carried out to investigate the inception criterion for entrainment of molten slag droplet in an entrained flow coal gasifier. Liquid film thickness was measured using a high-speed camera for 4 types of liquid with various viscosities and surface tensions. It was clearly shown that the measured average wave amplitude had a good correlation with the gas Reynolds number, and that the predicted critical gas velocity for droplet inception using new formula of wave amplitude had a good agreement with the experimental results under the condition of very low fluid Reynolds number (Ref≦10). The critical Weber number W ec = 1.73 was obtained as inception criterion of droplet entrainment.

UR - http://www.scopus.com/inward/record.url?scp=59649103879&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=59649103879&partnerID=8YFLogxK

U2 - 10.1299/kikaib.74.2279

DO - 10.1299/kikaib.74.2279

M3 - Article

AN - SCOPUS:59649103879

VL - 74

SP - 2279

EP - 2286

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 11

ER -

Study on droplet entrainment of high-viscosity falling liquid film

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this