Development of system for measuring bubble coalescence time by using a laser

K. Ueyama, M. Saeki, Masahiko Matsukata

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A new system to measure very short bubble coalescence time was developed using a laser. The system's reliability was confirmed by comparing the system output with photographic observation by high-speed video camera. The result for aqueous solutions of n-alcohol was in good agreement with the previous data. The system was applied to various kinds of aqueous solutions more dilute than those in previous work where the value of bubble coalescence time was expected to be 2ms. It was revealed that the bubble coalescence time reported in previous work was composed of two parts. The first part was the time length of the contacting period of two bubbles and the second was the time length of the initial stage of a film rupture between the bubbles. The former decreased considerably, even to an undetectably small value, with decrease in concentration, but the latter was constantly at about 0.3ms regardless of concentration. Effects of bubble age and bubble approach velocity were examined. It was also found that the bubble coalescence time in surfactant solution was significantly influenced in a narrow concentration region as low as ppb order and that the bubbles did not coalesce in solution of higher concentration. (Authors)

Original languageEnglish
Pages (from-to)308-314
Number of pages7
JournalJournal of Chemical Engineering of Japan
Volume26
Issue number3
Publication statusPublished - 1993
Externally publishedYes

Fingerprint

Coalescence
Lasers
Bubbles (in fluids)
High speed cameras
Video cameras
Surface-Active Agents
Alcohols
Surface active agents

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Development of system for measuring bubble coalescence time by using a laser. / Ueyama, K.; Saeki, M.; Matsukata, Masahiko.

In: Journal of Chemical Engineering of Japan, Vol. 26, No. 3, 1993, p. 308-314.

Research output: Contribution to journalArticle

@article{da0b0b318b5946268f637847c6570b78,
title = "Development of system for measuring bubble coalescence time by using a laser",
abstract = "A new system to measure very short bubble coalescence time was developed using a laser. The system's reliability was confirmed by comparing the system output with photographic observation by high-speed video camera. The result for aqueous solutions of n-alcohol was in good agreement with the previous data. The system was applied to various kinds of aqueous solutions more dilute than those in previous work where the value of bubble coalescence time was expected to be 2ms. It was revealed that the bubble coalescence time reported in previous work was composed of two parts. The first part was the time length of the contacting period of two bubbles and the second was the time length of the initial stage of a film rupture between the bubbles. The former decreased considerably, even to an undetectably small value, with decrease in concentration, but the latter was constantly at about 0.3ms regardless of concentration. Effects of bubble age and bubble approach velocity were examined. It was also found that the bubble coalescence time in surfactant solution was significantly influenced in a narrow concentration region as low as ppb order and that the bubbles did not coalesce in solution of higher concentration. (Authors)",
author = "K. Ueyama and M. Saeki and Masahiko Matsukata",
year = "1993",
language = "English",
volume = "26",
pages = "308--314",
journal = "Journal of Chemical Engineering of Japan",
issn = "0021-9592",
publisher = "Society of Chemical Engineers, Japan",
number = "3",

}

TY - JOUR

T1 - Development of system for measuring bubble coalescence time by using a laser

AU - Ueyama, K.

AU - Saeki, M.

AU - Matsukata, Masahiko

PY - 1993

Y1 - 1993

N2 - A new system to measure very short bubble coalescence time was developed using a laser. The system's reliability was confirmed by comparing the system output with photographic observation by high-speed video camera. The result for aqueous solutions of n-alcohol was in good agreement with the previous data. The system was applied to various kinds of aqueous solutions more dilute than those in previous work where the value of bubble coalescence time was expected to be 2ms. It was revealed that the bubble coalescence time reported in previous work was composed of two parts. The first part was the time length of the contacting period of two bubbles and the second was the time length of the initial stage of a film rupture between the bubbles. The former decreased considerably, even to an undetectably small value, with decrease in concentration, but the latter was constantly at about 0.3ms regardless of concentration. Effects of bubble age and bubble approach velocity were examined. It was also found that the bubble coalescence time in surfactant solution was significantly influenced in a narrow concentration region as low as ppb order and that the bubbles did not coalesce in solution of higher concentration. (Authors)

AB - A new system to measure very short bubble coalescence time was developed using a laser. The system's reliability was confirmed by comparing the system output with photographic observation by high-speed video camera. The result for aqueous solutions of n-alcohol was in good agreement with the previous data. The system was applied to various kinds of aqueous solutions more dilute than those in previous work where the value of bubble coalescence time was expected to be 2ms. It was revealed that the bubble coalescence time reported in previous work was composed of two parts. The first part was the time length of the contacting period of two bubbles and the second was the time length of the initial stage of a film rupture between the bubbles. The former decreased considerably, even to an undetectably small value, with decrease in concentration, but the latter was constantly at about 0.3ms regardless of concentration. Effects of bubble age and bubble approach velocity were examined. It was also found that the bubble coalescence time in surfactant solution was significantly influenced in a narrow concentration region as low as ppb order and that the bubbles did not coalesce in solution of higher concentration. (Authors)

UR - http://www.scopus.com/inward/record.url?scp=0027434541&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027434541&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0027434541

VL - 26

SP - 308

EP - 314

JO - Journal of Chemical Engineering of Japan

JF - Journal of Chemical Engineering of Japan

SN - 0021-9592

IS - 3

ER -