A NOVEL TECHNIQUE FOR MEASURING LOCAL BUBBLE SIZE DISTRIBUTION

Risultato della ricerca: Other

Abstract

A novel experimental technique for measuring the local gas hold-up and the statistical distribution of local bubble size, is proposed. The technique is based on laser sheet illumination of the gas-liquid dispersion and synchronized camera, i.e. on equipment typically available in PIV set-ups. The liquid phase is made fluorescent by a suitable dye, and a band-pass optical filter is placed in front of the camera optics, in order to allow only fluoresced light to reach the camera CCD. In this way bubbles intercepted by the laser sheet are clearly identified thanks to the neat shade resulting in the images. This allows excluding from subsequent analysis all bubbles visible in the images but not actually intercepted by the laser sheet, so resulting in better spatial resolution and data reliability.Preliminary data obtained in a stirred gas-liquid dispersion confirm the technique viability and reliability.
Lingua originaleEnglish
Pagine1-6
Numero di pagine0
Stato di pubblicazionePublished - 2009

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bubbles
cameras
gases
lasers
shades
optical filters
particle image velocimetry
liquids
statistical distributions
CCD cameras
viability
liquid phases
spatial resolution
dyes
illumination
optics

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title = "A NOVEL TECHNIQUE FOR MEASURING LOCAL BUBBLE SIZE DISTRIBUTION",
abstract = "A novel experimental technique for measuring the local gas hold-up and the statistical distribution of local bubble size, is proposed. The technique is based on laser sheet illumination of the gas-liquid dispersion and synchronized camera, i.e. on equipment typically available in PIV set-ups. The liquid phase is made fluorescent by a suitable dye, and a band-pass optical filter is placed in front of the camera optics, in order to allow only fluoresced light to reach the camera CCD. In this way bubbles intercepted by the laser sheet are clearly identified thanks to the neat shade resulting in the images. This allows excluding from subsequent analysis all bubbles visible in the images but not actually intercepted by the laser sheet, so resulting in better spatial resolution and data reliability.Preliminary data obtained in a stirred gas-liquid dispersion confirm the technique viability and reliability.",
keywords = "bubble size distribution, gas-liquid systems, image analysis, stirred vessels",
author = "Franco Grisafi and Alberto Brucato and Francesca Scargiali and Antonio Busciglio",
year = "2009",
language = "English",
pages = "1--6",

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TY - CONF

T1 - A NOVEL TECHNIQUE FOR MEASURING LOCAL BUBBLE SIZE DISTRIBUTION

AU - Grisafi, Franco

AU - Brucato, Alberto

AU - Scargiali, Francesca

AU - Busciglio, Antonio

PY - 2009

Y1 - 2009

N2 - A novel experimental technique for measuring the local gas hold-up and the statistical distribution of local bubble size, is proposed. The technique is based on laser sheet illumination of the gas-liquid dispersion and synchronized camera, i.e. on equipment typically available in PIV set-ups. The liquid phase is made fluorescent by a suitable dye, and a band-pass optical filter is placed in front of the camera optics, in order to allow only fluoresced light to reach the camera CCD. In this way bubbles intercepted by the laser sheet are clearly identified thanks to the neat shade resulting in the images. This allows excluding from subsequent analysis all bubbles visible in the images but not actually intercepted by the laser sheet, so resulting in better spatial resolution and data reliability.Preliminary data obtained in a stirred gas-liquid dispersion confirm the technique viability and reliability.

AB - A novel experimental technique for measuring the local gas hold-up and the statistical distribution of local bubble size, is proposed. The technique is based on laser sheet illumination of the gas-liquid dispersion and synchronized camera, i.e. on equipment typically available in PIV set-ups. The liquid phase is made fluorescent by a suitable dye, and a band-pass optical filter is placed in front of the camera optics, in order to allow only fluoresced light to reach the camera CCD. In this way bubbles intercepted by the laser sheet are clearly identified thanks to the neat shade resulting in the images. This allows excluding from subsequent analysis all bubbles visible in the images but not actually intercepted by the laser sheet, so resulting in better spatial resolution and data reliability.Preliminary data obtained in a stirred gas-liquid dispersion confirm the technique viability and reliability.

KW - bubble size distribution

KW - gas-liquid systems

KW - image analysis

KW - stirred vessels

UR - http://hdl.handle.net/10447/62105

UR - http://www.wcce8.org/prog_tech_program.html

M3 - Other

SP - 1

EP - 6

ER -