Small-scale flow topologies, pseudo-turbulence, and impact on filtered drag models in turbulent fluidization
F. Dabbagh, Simon Schneiderbauer
Abstract
The small-scale flow topologies in a moderately dense (gas-particle) turbulent fluidization have been investigated using highly-resolved Eulerian two-fluid model simulations. Enhanced contraction of focal (enstrophy) and nodal (strain) gas phase structures are found as a result of the solid particles presence. The gas structures, thereby, revealed a tendency towards boundary-layer-like turbulence. In the solid phase, the focal topologies are arranged in elongated vortical tubes corresponding to dense clusters, which in turn induce a pseudo-turbulence on the gas phase.
Topics & Concepts
TurbulenceDragMechanicsEnstrophyBoundary layerFluidizationPhysicsTwo-phase flowFlow (mathematics)Materials scienceVortexVorticityThermodynamicsFluidized bedParticle Dynamics in Fluid FlowsGranular flow and fluidized bedsFluid Dynamics and Heat Transfer