Suppression of acoustic streaming in shape-optimized channels

Abstract

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 acoustic~streaming.

arXiv comment6 pages, 4 figures, RevTex

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Cited by in corpus (5)

• Fast microscale acoustic streaming driven by a temperature-gradient-induced non-dissipative acoustic body force
• Modeling fast acoustic streaming: steady state and transient flow solutions
• Theory and simulation of AC electroosmotic suppression of acoustic streaming
• Analytical solution for an acoustic boundary layer around an oscillating rigid sphere
• Boundary-layer modeling of polymer-based acoustofluidic devices