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We observe distinct regimes of orbital angular momentum (OAM) transfer from two-dimensional Bessel-shaped acoustic vortices to matter. In a homogeneous diphasic mixture of microparticles and water, slow swirling about the vortex axis is seen. This effect is driven by absorption of OAM across the mixture, the motion following the OAM density distribution. Larger particles are formed into clusters by the acoustic radiation force making the mixture non-homogeneous. Here OAM transfer to thedoi:10.1103/physrevlett.114.214301 pmid:26066437 fatcat:gpjlj3dclvbkxnzf3oa43nw4ce