Finite element modeling of ultrasonic separation at the microscale

In this paper, the working principle of an acoustic chromatography device is investigated by the analytical and finite element modeling (FEM) approach. Analytical and simulation results, compared to the inteferometric scan and the experimental results, confirm that the inertial field due to the flexural waves on the capillary has the major role for manipulation of particles. Disagreement between phase velocity from the simple beam bending solution and experiments at high frequencies are also discussed.