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Migration of Droplets Under Reduced Gravity

  • Volkmar Delitzsch
  • Helmut Eckelmann
  • Walter Wuest
Conference paper
Part of the International Union of Theoretical and Applied Mechanics book series (IUTAM)

Abstract

The migration of water droplets in butyl benzoate was investigated in a test cell. Both liquids are immiscible with one another and have the same density at about 32°C. At a temperature gradient of about 1°C/cm in stratified butyl benzoate in equilibrium the gravity is reduced to a hundredth of the interfacial force. Water droplets injected into the test cell are sorted out in the gravity field dependent on their diameters. The positions of the droplets in the test cell were photographically evaluated. The interface tension gradient was estimated at 10-6 N/°C m with the help of the formula of Young et al.

Keywords

Interfacial Tension Water Droplet Gravity Field Test Cell Gravity Force 
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References

  1. 1.
    Langbein, D.; Heide, W.: Entmischung von Flüssigkeiten aufgrund von Grenzfiächenkonvektion. ZWF 8 (1984) 192.Google Scholar
  2. 2.
    Subramanian, R.S.: Thermocapillary Migration of Bubbles and Droplets. XXIV COSPAR Meeting, Ottawa/Canada, May 1982, Paper No. 9. 5. 2.Google Scholar
  3. 3.
    Young, N.O.; Goldstein, J.S.; Block, M.J.: The motion of bubbles in a vertical temperature gradient. J. Fluid Mech. 6 (1959) 350.CrossRefMATHADSGoogle Scholar
  4. 4.
    Narasaki, T.: The Effect of Temperature Gradient on the Motion of a Bubble in Reduced Gravity. XXIV COSPAR Meeting Ottawa/Canada, May 1982, Paper No. 9. 5. 1.Google Scholar

Copyright information

© Springer-Verlag, Berlin, Heidelberg 1985

Authors and Affiliations

  • Volkmar Delitzsch
    • 1
  • Helmut Eckelmann
    • 1
  • Walter Wuest
    • 1
    • 2
  1. 1.Institut für Angewandte Mechanik und StrömungsphysikUniversität GöttingenGöttingenFed. Rep. of Germany
  2. 2.DFVLR-AVAGöttingenFed. Rep. of Germany

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