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Experiments in Fluids

, Volume 27, Issue 2, pp 157–166 | Cite as

In situ force-balance tensiometry

  • G. S. Lapham
  • D. R. Dowling
  • W. W. Schultz

Abstract

 Although a fundamental physical parameter, surface tension is difficult to measure. Common tensiometry inaccuracy comes from failure to control air–liquid–solid contact conditions, or account for liquid meniscus geometry and buoyancy corrections. This paper describes an in situ tensiometry technique, based on withdrawal of a thin-walled tube from the liquid interface, that enforces a known air–liquid–solid contact condition. This technique can be pursued at any level of experimental hygiene. Experimental results for filtered tap water, an alcohol–water solution, and a surfactant–water solution show that results repeatable to three significant digits are obtained with modest effort for a variety of geometrical parameters.

Keywords

Alcohol Surfactant Surface Tension Geometrical Parameter Physical Parameter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • G. S. Lapham
    • 1
  • D. R. Dowling
    • 1
  • W. W. Schultz
    • 1
  1. 1.Department of Mechanical Engineering and Applied Mechanics University of Michigan, Ann Arbor, MI 48109-2125, USAUS

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