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Comparison of numerical models for bulk and surface acoustic wave-induced acoustophoresis in a microchannel

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Abstract

Acoustophoresis induced by either bulk or surface acoustic wave has great potential to manipulate microparticles and biological substances because of its simple setup, low power consumption, and high generated force. Numerical models for simulating acoustophoresis in a microchannel are required to further understand the underlying mechanisms (i.e., standing acoustic wave and microparticle motion) and optimize the design. Simplified models that only consider the channel walls as actuation and impedance boundaries are available. In this study, full-sized models were established to include many phenomena and physical interactions involved and then compared with the simulation results using the simplified models. Distributions of acoustic pressure, streaming velocity, radiation force, and trajectory of 1 µm and 10 µm microparticles were calculated for further understanding of acoustofluidics. Overall, the full-sized models can provide an accurate guideline for the application and development of acoustophoresis.

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Data Availability Statement

This manuscript has associated data in a data repository. [Authors’ comment: All data included in this manuscript are available upon request contacting with the corresponding author.]

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Acknowledgements

This work was supported by the Academic Research Fund (AcRF Tier 1, RG47/18), Ministry of Education, Singapore.

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Authors and Affiliations

  1. School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore

    Yufeng Zhou

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In this work, Dr. Zhou made the simulation, performed data analysis, and wrote the manuscript.

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Correspondence to Yufeng Zhou.

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The author declares no conflicts of interest. Also, the funding sponsor had no role in the design of the study, the collection, analyses or interpretation of data, nor in the writing of the manuscript and in the decision to publish the results.

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Zhou, Y. Comparison of numerical models for bulk and surface acoustic wave-induced acoustophoresis in a microchannel. Eur. Phys. J. Plus 135, 696 (2020). https://doi.org/10.1140/epjp/s13360-020-00697-x

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