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Theory of pressure acoustics with thermoviscous boundary layers and streaming in elastic cavities
Jonas H. Joergensen, Henrik Bruus
We present an effective thermoviscous theory of acoustofluidics including pressure acoustics, thermoviscous boundary layers, and streaming for fluids embedded in elastic cavities.…
Fabrication, characterization, and simulation of glass devices with AlN-thin-film-transducers for excitation of ultrasound resonances
André G. Steckel, Henrik Bruus, Paul Muralt +1
We present fabrication of 570-um-thick, millimeter-sized soda-lime-silicate float glass blocks with a 1-um-thick AlN-thin-film piezoelectric transducer sandwiched between thin meta…
Particle-size-dependent acoustophoretic motion and depletion of micro- and nanoparticles at long time scales
Wei Qiu, Henrik Bruus, Per Augustsson
We present three-dimensional measurements of size-dependent acoustophoretic motion of microparticles with diameters from 4.8 um down to 0.5 um suspended in either homogeneous or in…
Suppression of acoustic streaming in shape-optimized channels
Jacob S. Bach, Henrik Bruus
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…
Theory of acoustic trapping of microparticles in capillary tubes
Jacob S. Bach, Henrik Bruus
We present a semi-analytical theory for the acoustic fields and particle-trapping forces in a viscous fluid inside a capillary tube with arbitrary cross section and ultrasound actu…