9 research outputs found
Dimensionality influence on passive scalar transport
We numerically investigate the advection of a passive scalar through an interface placed inside a decaying shearless turbulent mixing layer. We consider the system in both two and three dimensions. The dimensionality produces a different time scaling of the diffusion, which is faster in the two-dimensional case. Two intermittent fronts are generated at the margins of the mixing layer. During the decay these fronts present a sort of propagation in both the direction of the scalar flow and the opposite direction. In two dimensions, the propagation of the fronts exhibits a significant asymmetry with respect to the initial position of the interface and is deeper for the front merged in the high energy side of the mixing. In three dimensions, the two fronts remain nearly symmetrically placed. Results concerning the scalar spectra exponents are also presente
Dimensionality influence of the passive scalar transport observed through experiments on the turbulence shearless mixing
Dimensionality influence on the passive scalar transport observed through numerical experiments on turbulence shearless mixings
Two-dimensional shearless turulence mixing kinetic energy self diffusion, also in the presence of a stable stratification
Inertial Particle Collisions in Turbulent Synthetic Flows : Quantifying the Sling Effect
Passive scalar diffusion through a turbulent energy step
Turbulent transport, passive scala