Viscosity and rheological behavior of microbubbles in capillary tubes

Authors

  • Mohammad Mehdi Shams,

    1. Schulich School of Engineering, Dept. of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta, Canada
    Search for more papers by this author
  • Mingzhe Dong,

    Corresponding author
    1. Schulich School of Engineering, Dept. of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta, Canada
    2. College of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao, Shandong, China
    Search for more papers by this author
  • Nader Mahinpey

    1. Schulich School of Engineering, Dept. of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta, Canada
    Search for more papers by this author

Abstract

The viscosity of microbubbles has been measured in capillary tubes. Experiments were conducted in tubes of different diameters and lengths, with a constant microbubble concentration. The effects of bubble void fraction and size distribution on the viscosity of microbubbles were also investigated. Microbubbles demonstrate shear-thinning non-Newtonian behavior. The viscosity of microbubbles decreases with a decrease in tube diameter and bubble void fraction, and with an increase in tube length. Although viscosity changes with tube dimensions, the flow index (n) is only influenced by the microbubble void fraction. It is also found that bubble size distribution in the range (1–12 µm) used in this study does not affect the viscosity of microbubbles. The data were then used to develop a correlation to predict viscosity of microbubbles, which represents the experimental viscosity data with an absolute average relative deviation less than 1.3%. © 2014 American Institute of Chemical Engineers AIChE J, 60: 2660–2669, 2014

Ancillary