The article presents the development and analysis of the models of various IDT designs and for the acoustophoretic control of microparticles in of lab chip microchannels. The novelty of the work consists in the development of mathematical models for new configurations of IDT, suitable for focusing, sorting and concentrating of heterogeneous microparticles. The developed models are implemented in the COMSOL environment, which allows the designer to use them for the calculation of the specified IDT structures for real acoustofluidic lab-chips. It is shown that increasing the performance and stability of the SAW can be achieved by choosing the material of the piezoelectric substrate with a high coefficient of electromechanical coupling, as well as optimizing the structural and technological parameters of both IDT and microchannel. Various variants of constructions of the IDT were considered and their comparative analysis was carried out.
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