Vortex stretching and enstrophy production in high Reynolds number turbulence
Dhawal Buaria, Eberhard Bodenschatz, Alain Pumir
Abstract
The vortex stretching mechanism is studied in fully developed turbulence using direct numerical simulations at high Reynolds numbers with unprecedented small-scale resolution. Various statistical correlations characterizing amplification of vorticity by the strain rate are identified, especially as a function of Reynolds number and strength of vorticity fluctuations, uncovering many previously unknown aspects of the vortex stretching process.
Topics & Concepts
EnstrophyVorticityReynolds numberVortexTurbulencePhysicsMechanicsClassical mechanicsDirect numerical simulationBurgers vortexVortex tubeFunction (biology)Vortex stretchingStatistical physicsReynolds decompositionStrouhal numberK-epsilon turbulence modelVortex sheddingReynolds stress equation modelReynolds stressTurbulence kinetic energyFlow (mathematics)Fluid Dynamics and Turbulent FlowsParticle Dynamics in Fluid FlowsFluid dynamics and aerodynamics studies