Anisotropy characterization of turbulent fluidization
F. Dabbagh, Simon Schneiderbauer
Abstract
The turbulence anisotropy in moderately dense turbulent fluidization is characterized with the aid of the barycentric anisotropy map (BAM). Therein, the phase-filtered anisotropy Reynolds stress tensor is considered to classify the possible states of turbulence into: 1C (one-dimensional), 2C (two-dimensional isotropic) and 3C (three-dimensional isotropic). The turbulence trajectories on the gas phase, as highlighted in the side Figure, have revealed a prevalent 2-D ellipse-like turbulence in the dilute regions, changing to 1-D turbulence in transition areas, and tend towards 3-D turbulence in elongated pancake-like at the interface and inside the clusters.
Topics & Concepts
TurbulenceAnisotropyIsotropyK-epsilon turbulence modelReynolds stressPhysicsTensor (intrinsic definition)K-omega turbulence modelPhase (matter)MechanicsClassical mechanicsMaterials scienceGeometryOpticsMathematicsQuantum mechanicsParticle Dynamics in Fluid FlowsGranular flow and fluidized bedsCyclone Separators and Fluid Dynamics