Acoustic agglomeration of titanium dioxide in the presence of stationary droplets as a function of the wave energy
The dependence of the acoustic agglomeration rate on the wave energy is a key parameter in the determination of the mechanisms which give rise to the agglomeration process. In these investigations, inertial droplets larger than a frequency dependent diameter, d(f), were generated by treatment of a glycol fog aerosol in a sound field (21 kHz, 100 watts) for a given time. Directly after their creation, inertialess TiO(2) particles with diameters less than d(f) were injected into the chamber and simultaneously the acoustic power was adjusted to the desired value. Measurements of the agglomeration rate show that in the 0.5 - 1.5 micron range, the rate at which the concentration of TiO(2) particles decreases is proportional to the applied acoustic power and thus to the square of the velocity amplitude of the wave. This is not the behaviour expected for the orthokinetic mechanism, even though the experimental conditions were such that this mechanism should have been favoured.
Bibliographic Reference: Paper presented: 9th Annual Conference of the Aerosol Society, Norwich (GB), April 4-6, 1995
Availability: Available from (1) as Paper EN 38867 ORA
Record Number: 199510303 / Last updated on: 1995-03-08
Original language: en
Available languages: en