Within the framework of the two-fluid approach, gas was treated with a large-eddy simulation and a sub-grid-scale （SGS） turbulent kinetic energy model while particles were treated with a second-order- moment method ...Within the framework of the two-fluid approach, gas was treated with a large-eddy simulation and a sub-grid-scale （SGS） turbulent kinetic energy model while particles were treated with a second-order- moment method to describe the anisotropy of the fluctuating velocity. A modified 5imonin model was derived for the gas-solid interphase fluctuating energy transfer. The anisotropic gas-solid flow in a cir- culating fluidized bed was investigated. Predictions were in good agreement with experimental data. The distributions of the second-order moment of particles and SGS-turbulent kinetic energy of gas were simulated at different solid mass fluxes. The effects of the solid mass flux on the particle second-order moment, particle anisotropic behavior, gas SGS-turbulent kinetic energy and gas SGS energy dissipation were analyzed for the circulating fluidized bed.展开更多
文摘Within the framework of the two-fluid approach, gas was treated with a large-eddy simulation and a sub-grid-scale （SGS） turbulent kinetic energy model while particles were treated with a second-order- moment method to describe the anisotropy of the fluctuating velocity. A modified 5imonin model was derived for the gas-solid interphase fluctuating energy transfer. The anisotropic gas-solid flow in a cir- culating fluidized bed was investigated. Predictions were in good agreement with experimental data. The distributions of the second-order moment of particles and SGS-turbulent kinetic energy of gas were simulated at different solid mass fluxes. The effects of the solid mass flux on the particle second-order moment, particle anisotropic behavior, gas SGS-turbulent kinetic energy and gas SGS energy dissipation were analyzed for the circulating fluidized bed.
