Sarah CLEVE : Microstreaming induced by non-spherically oscillating microbubbles

abstract :
Microbubbles exposed to a sufficiently strong ultrasound field may show non-spherically oscillating modes, called surface modes. These oscillations induce a slow mean flow in the proximity of the bubble surface, the microstreaming. Microstreaming flows play an important role in medical applications (for instance sonoporation) and microfluidics (for instance mixing). A better understanding of such flows will hence be beneficial to a large number of applications. The objective of the PhD thesis is to study the structures of microstreaming around bubbles in dependence of the appearing surface modes. The orientation of the modes is controlled by a new technique based on bubble coalescence.