Abstract
Based on the kinetic theory of granular flow and Smagorinsky eddy viscosity model, a gas-solid two-fluid model by means of large eddy simulation is proposed. The subgrid closures for the solid pressure, viscosity and thermal conductivity are presented. A cluster structure-dependent (CSD) drag coefficient model is proposed to consider the heterogeneity by clusters in the riser. Flow behavior of gas and solids phases is predicted by means of double large eddy simulations. The time-averaged distributions of particles concentration and velocity are obtained, and the core-annular structure is predicted. Simulated results are in agreement with Knowlton et al. experimental data in a riser.
| Original language | English |
|---|---|
| Pages (from-to) | 1327-1330 |
| Number of pages | 4 |
| Journal | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics |
| Volume | 32 |
| Issue number | 8 |
| State | Published - Aug 2011 |
| Externally published | Yes |
Keywords
- CSD model
- Granular kinetic theory
- Large eddy simulation
- Riser
- Sub-grid scale model
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