Local energy flux of turbulent flows
Alexandros Alexakis, Sergio Chibbaro
Abstract
The local energy flux rate toward small scales in isotropic turbulent flows is investigated. The joint probability density function is calculated, with the local filtered strain rate, for a scale in the inertial range. The flux shows good correlation with the strain, in support of the Smagorinsky eddy viscosity model. The implications of the results for subgrid scale models are discussed and new modeling directions are proposed.
Topics & Concepts
TurbulenceMechanicsIsotropyScale (ratio)Flux (metallurgy)PhysicsProbability density functionEnergy fluxInertial frame of referenceStatistical physicsLarge eddy simulationTurbulence modelingKolmogorov microscalesViscosityHomogeneous isotropic turbulenceClassical mechanicsTurbulence kinetic energyScalingFunction (biology)Energy (signal processing)Length scaleFlow (mathematics)K-epsilon turbulence modelRange (aeronautics)Joint (building)Fluid Dynamics and Turbulent FlowsParticle Dynamics in Fluid FlowsLaser-Plasma Interactions and Diagnostics