Measurement of air bubble size using densitometer

Authors

  • S. Zhu,

    1. McMaster Center for Pulp and Paper Research, Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7
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  • R. H. Pelton,

    Corresponding author
    1. McMaster Center for Pulp and Paper Research, Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7
    • McMaster Center for Pulp and Paper Research, Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7
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  • M. Ajersch,

    1. McMaster Center for Pulp and Paper Research, Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7
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  • M. Towers,

    1. McMaster Center for Pulp and Paper Research, Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7
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  • M. H. I. Baird

    1. McMaster Center for Pulp and Paper Research, Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7
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Abstract

A simple mass-transfer model is derived which gives the initial air bubble size distributions in a dispersion of air bubbles in water from the density/time responses to a step increase of pressure. Bubble size distributions from the model showed reasonable agreement with direct optical measurements. This work is applicable to dilute dispersions of bubbles which experience a sufficiently large increase in pressure such that the resulting solution is unsaturated with air.

Abstract

On a établi un modèle simple de transfert de matière qui donne les distributions de taille des bulles ďair initiales dans une dispersion de bulles ďair dans ľeau à partir des réponses masse volumique/temps par suite ďune augmentation-échelon de la pression. Les distributions de taille des bulles du modèle se comparent de manière acceptable avec les mesures optiques directes. Ce travail peut s ' appliquer aux dispersions diluées de bulles qui connaissent une augmentation de pression suffisamment importante pour que la solution qui en résulte soit non saturée dans ľair.

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