Suppression of Acoustic Streaming in Shape-Optimized Channels

Jacob S. Bach*, Henrik Bruus

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Acoustic streaming is an ubiquitous phenomenon resulting from time-averaged nonlinear dynamics in oscillating fluids. In this theoretical study, we show that acoustic streaming can be suppressed by two orders of magnitude in major regions of a fluid by optimizing the shape of its confining walls. Remarkably, the acoustic pressure is not suppressed in this shape-optimized cavity, and neither is the acoustic radiation force on suspended particles. This basic insight may lead to applications, such as acoustophoretic handling of nm-sized particles, which is otherwise impaired by the streaming.
Original languageEnglish
Article number214501
JournalPhysical Review Letters
Issue number21
Number of pages6
Publication statusPublished - 2020


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