Abstract
We investigate the mixing properties of an acoustic driven flow in a parallelepipedic cavity with square basis. Relying on nonnormal reflections, an acoustic beam with a square path is obtained, generating a global complex flow in the cavity which enables chaotic advection. For a moderate power of the source, the chaotic region invades the whole cavity, illustrating that acoustic streaming can be used successfully as a nonintrusive tool to mix efficiently.
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