6 papers
Characterizing particle rearrangements in sheared highly polydisperse materials
Waad Paliwal, Eric R. Weeks
We compare three particle-scale measures of rearrangement in highly polydisperse materials under driven flow: (a) nonaffine motion defined relative to the time-averaged mean flow,…
Droplet Breakup Against an Isolated Obstacle
David J. Meer, Shivnag Sista, Mark D. Shattuck +2
We describe combined experiments and simulations of droplet breakup during flow-driven interactions with a circular obstacle in a quasi-two-dimensional microfluidic chamber. Due to…
Nonaffine motion in flowing highly polydisperse granular media
Pablo Eduardo Illing, Eric R. Weeks
We study the particle-scale motion of highly polydisperse hard disks flowing in a two-dimensional bent channel. We use various size distributions of particles, in which the largest…
Aging of colloidal gels in microgravity
Swagata S. Datta, Waad Paliwal, Eric R. Weeks
We study the aging of colloidal gels using light microscopy movies of depletion gels from the International Space Station. Under such microgravity conditions, we observe a slowdown…
Flow and clogging of capillary droplets
Yuxuan Cheng, Benjamin F. Lonial, Shivnag Sista +5
Capillary droplets form due to surface tension when two immiscible fluids are mixed. We describe the motion of gravity-driven capillary droplets flowing through narrow constriction…
Microstructure of polydisperse colloidal gels
Benjamin F. Lonial, Eric R. Weeks
We use confocal microscopy to image colloidal gels formed from highly polydisperse particles. We suspend our polydisperse particles in a density matched solvent, and let the partic…