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Kinetic theory based segregation model for density-bidisperse dense granular flows
| Content Provider | Semantic Scholar |
|---|---|
| Author | Duan, Yifei Umbanhowar, Paul Ottino, Julio M. Lueptow, Richard M. |
| Copyright Year | 2019 |
| Abstract | Individual constituent balance equations are often used to derive expressions for species specific segregation velocities in flows of dense granular mixtures. We propose an expression for the interspecies momentum exchange in density bidisperse granular flows as an extension of ideas from kinetic theory, expanding its range from short-duration binary collisions to the multiple enduring contacts characteristic of dense shear flows, and incorporating the effects of particle friction, concentration ratio, and local flow conditions. The segregation velocity derived from the momentum balance equation with the new interspecies drag model matches results from DEM simulations and accurately predicts the downward and upward segregation velocities of heavy and light particles through the depth of the flowing layer for different density ratios and constituent concentrations for both confined shear and free surface heap flows. |
| File Format | PDF HTM / HTML |
| DOI | 10.1103/PhysRevFluids.5.044301 |
| Alternate Webpage(s) | https://arxiv.org/pdf/1906.03378v1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1103/PhysRevFluids.5.044301 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
