(310h) Fully 3D Magnetic Resonance Imaging of Bubble Dynamics in Viscous Dense Suspensions

Multi-band echo planar imaging (EPI) magnetic resonance imaging (MRI) is used to image bubble dynamics in 3D with mm spatial resolution in opaque suspensions in 3D with temporal resolution under 1 s. A specially developed multichannel radiofrequency coil combined a with whole body MRI scanner is used to image a cylindrical system 20 cm in diameter and 40 cm tall. Viscous silicone oil with sesame seeds of varying concentrations are used to study the effects of particle packing fraction on 3D bubble dynamics and resulting wake dynamics. We investigate the effects of single bubbles versus streams of bubbles on bubble dynamics.