一维湍流模型对气固剪切流的数值模拟

he One Dimensional Turbulence (ODT) method is used to study spatially developing particle laden shear flows based on a novel proposed particle-eddy interaction model. The instantaneous and average flow fields of the gas phase are simulated with ODT model. The particle motions are tracked with a Lagrangian scheme. When a particle enters an eddy that is given by the ODT simulation, an instantaneous particle-eddy interaction model is used to represent turbulence-induced particle dispersion. The model is validated by comparisons between numerical results and measured data of a two-phase shear flow. Particle-size dependence of particle dispersion is studied. Although turbulent mixing process strengthens the particle dispersion in shear layers, those intermediate particles whose Stokes number are close to unity tend to concentrate in a regular pattern.