Experimental investigation of bidensity slurries on an incline
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We investigate the dynamics of bidensity slurries on an incline. The particle-fluid mixture consists of two species of negatively buoyant particles that have roughly the same size but significantly variant densities. This mismatch in particle densities induces or prevents settling depending on the relative amount of heavy to light particles, leading to complex regimes also found in the monodisperse case. In addition, when settling effects dominate within the thin film, we observe the phase separation down the incline between the particles and the liquid, as well as between two particle types.
KeywordsParticle-laden flow Thin films Bidisperse slurries Shear-induced migration Particle segregation
The authors would like to thank K. Allison, T. Crawford, S. Meguerdijian, and W. Rosenthal for their preliminary work on the bidensity experiments and image processing. This work was supported by UC Lab Fees Research Grant 09-LR-04-116741-BERA and NSF Grants DMS-1312543, DMS-1048840 and DMS-1045536.
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