Title :
9B-1 Coupled Dynamics of an Isolated UCA Microbubble Pair
Author :
Garbin, V. ; Dollet, B. ; Overvelde, M.L.J. ; de Jong, N. ; Lohse, D. ; Versluis, M. ; Cojoc, D. ; Ferrari, E. ; Fabrizio, E. Di
Author_Institution :
Univ. of Twente, Enschede
Abstract :
We present time-resolved optical measurements of the coupled dynamics of two UCA microbubbles in ultrasound. We isolate microbubble pairs using optical tweezers to move them away from confining walls and study purely the bubble-bubble interaction. The dynamics in ultrasound is recorded optically using the ultra-high speed camera Brandaris 128. Our measurements indicate that the viscous drag on a translating and oscillating microbubble is not accounted for with enough accuracy by existing models using the elementary form of Stokes drag.
Keywords :
acoustic materials; bubbles; cameras; drag; high-speed optical techniques; radiation pressure; Bjerknes force; Stokes drag; acoustic radiation pressure; bubble-bubble interaction; isolated UCA microbubble coupled dynamics; optical tweezers; oscillating microbubble; time-resolved optical measurements; translating microbubble; ultra-high speed camera Brandaris 128; ultrasound contrast agent; viscous drag; Acoustic beams; Charge carrier processes; Charge coupled devices; Charge-coupled image sensors; Fluid dynamics; Friction; Laser beams; Optical microscopy; Optical recording; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 2007. IEEE
Conference_Location :
New York, NY
Print_ISBN :
978-1-4244-1384-3
Electronic_ISBN :
1051-0117
DOI :
10.1109/ULTSYM.2007.194
