Analysis of the dissipative range of the energy spectrum in grid turbulence and in direct numerical simulations
Anastasiia Gorbunova, Guillaume Balarac, Mickaël Bourgoin, Léonie Canet, Nicolas Mordant, Vincent Rossetto
Abstract
To determine how a fluid carries its energy down to microscopic scales where it is dissipated, a result from the assumption-free theory of the nonperturbative renormalization group was tested, using numerical simulations and data from the ONERA wind tunnel. The findings confirm that the kinetic energy spectrum follows the predicted stretched exponential in the dissipation range .
Topics & Concepts
PhysicsDissipationDissipative systemTurbulenceRange (aeronautics)Kinetic energyStatistical physicsClassical mechanicsRenormalization groupTurbulence kinetic energyEnergy (signal processing)RenormalizationK-omega turbulence modelEnergy spectrumSpectrum (functional analysis)Spectral densityExponential functionGridMechanicsScale (ratio)K-epsilon turbulence modelComputational physicsNumerical analysisComputer simulationFluctuation spectrumQuantum electrodynamicsLogarithmKinetic theoryDirect numerical simulationFluid Dynamics and Turbulent FlowsCombustion and flame dynamicsWind and Air Flow Studies