DETERMINATION OF INTERFACIAL OR SURFACE TENSION

摘要

A method and apparatus for measuring interfacial or surface tension of a first fluid dispersed in a second fluid, the method involving providing at least one substantially spherical droplet or bubble of the first fluid in a flowing stream of the second fluid in a flow channel, followed by passing the flowing stream comprising the droplet or bubble through a constriction in the flow channel, the constriction being sufficiently constricting so as to cause the droplet or bubble to deform away from its substantially spherical shape and measuring and comparing a physical property of the flowing stream both before and after the constriction, wherein the physical property changes as a result of the deformation of the droplet or bubble, and thereby inferring the interfacial or surface tension from the measured physical property.

主权项

1. A method of measuring interfacial or surface tension of a first fluid dispersed in a second fluid, the method comprising:
providing at least one substantially spherical droplet or bubble of the first fluid in a flowing stream of the second fluid in a flow channel; passing the flowing stream comprising the droplet or bubble of the first fluid through a constriction in the flow channel, wherein the constriction is sufficiently constricting so as to cause the droplet or bubble to deform away from its substantially spherical shape; at least one of measuring and comparing a physical property of the flowing stream before and after the constriction, wherein the physical property changes as a result of the deformation of the droplet or bubble as it passes through the constriction; and determining the interfacial or surface tension of the first fluid from at least one of the measured physical property and the compared physical property.