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Method for positioning small particles in a fluid Patent Nr. WO2004079716, ETH Zürich, Switzerland, 16.9.2004 AbstractThe invention covers the field of positioning of small particles in a fluid.
Disclosed is a method by which small particles are positioned by a sound field.
For generating the sound field an apparatus contains a plate excited to
vibrations by a transducer and a reflecting body with a rigid surface. A
mounting holds the vibrating plate and the transducer. The particles will be
concentrated at predetermined positions either at the rigid surface of the
reflecting body or levitating in the fluid. Due to the fact that the sound waves
are emitted by the vibrating plate particles can be positioned in entire area
between the vibrating plate and the reflecting body. | |||||||||||||
Haake,
A., Dual, J.