An instrument was constructed for measuring the dynamic
surface tension of water solutions by the oscillating jet
method. The values of the surface tension as a function
of the surface age are calculated by inserting into
Buhr's equation the waveparameters, density of the liquid
and flow rate of the jet. The jet is formed by a
hydrostatic pressure through an elliptical orifice. The
cross section of the standing wave in the jet is scanned
by an image sensor, from which the results are fed to a
microcomputer for computing and display.
The reproducibility of the measurement is better than 3 %
at the age range 0.8-20 ms. The practical measurements
made so far support the earlier research results, which
suggest that the surface tension is a function of the
surface age.
| Original language | English |
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| Place of Publication | Espoo |
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| Publisher | VTT Technical Research Centre of Finland |
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| Number of pages | 34 |
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| ISBN (Print) | 951-38-1609-5 |
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| Publication status | Published - 1983 |
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| MoE publication type | D4 Published development or research report or study |
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| Series | Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports |
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| Number | 140 |
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| ISSN | 0358-5077 |
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