Acoustic fluid shaking

Sonic irradiation without the use of air bubbles causes only little fluid motion and, therefore, bubbles are used [57]. Because of the uniform distribution of the air pockets, mixing is induced in the complete microchamber and not localized to one part only. The mixing time can be improved by increasing the number of bubbles. For example, in a dilution-type experiment, the mixing time using one bubble in a drum-shaped microchamber (300 pm depth 15 mm diameter) was 110 s, which was reduced to 45 s using four bubbles [56] - an improvement in the mixing time of about 60%. 

The stirred tank reactor is one of the most commonly used equipments in chemical engineering. In micromixers, such micromagnetic rotating bar stirrers and 

The mixer can be used for a wide variety of fluids with different electrochemical characteristics. 

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