Simulation of acoustic streaming for odorant display controlled by airborne ultrasound

The paper presents a method to control odorant material distribution in the air utilizing acoustic streaming produced by an ultrasonic phased array. By controlling the three-dimensional acoustic energy distribution, we can virtually locate airflow sources in the 3D space, which creates and controls the airflow paths in the workspace. As a special case, this paper shows the simulation result of a thin and long airflow produced by a Bessel beam created by an ultrasonic phased array.