Module for PAT1M
ODBA-1M Drop and Bubble Analyzer
The use of small spherical drops allows oscillation at much higher frequencies as it is accessible with the PAT technique. This is true due to decreased impact of inertia on the drop oscillation modes, which are expected to oscillate in a more or less radial way. As soon as additional (wobbling) modes come into play, the limits of this technique are reached. Unfortunately, there is not a single control parameter available as in PAT measurements to test the physically reasonable frequency limit. Only a general trend can be clearly seen: the smaller the drop and the smaller the amplitudes of oscillation are, the higher are the frequencies for physically reasonable experiments. A real test of this frequency limit would require experiments with liquid systems in absence of any surface active molecules, including possible impurities in the studied liquids.
