  Henrik Bruus is professor of lab-chip systems and theoretical physics at the
Technical University of Denmark. In this contribution, he summarizes some of
the recent results within theory and simulation of microscale acoustofluidic
systems that he has obtained in collaboration with his students and
international colleagues. The main emphasis is on three dynamical effects
induced by external ultrasound fields acting on aqueous solutions and particle
suspensions: The acoustic radiation force acting on suspended micro- and
nanoparticles, the acoustic streaming appearing in the fluid, and the newly
discovered acoustic body force acting on inhomogeneous solutions.
