36 citations · 210 across the 44 of their papers we have counts for
45 papers
Hidden Lagrangian coherence and memory effects in the statistics of Hamiltonian motions
Madalina Vlad, Dragos Iustin Palade, Florin Spineanu
This paper is focused on the coherent effects that appear in tracer statistics in two-dimensional incompressible turbulence in the presence of an average velocity. We show that thi…
Comment on the vortices of the early phase of the ELMs
Florin Spineanu, Madalina Vlad
We discuss a possible perspective on the process of transition from the layer of sheared poloidal rotation in the H-mode to a set of discrete filaments that concentrate vorticity a…
Effects of the parallel acceleration on heavy impurity transport in turbulent tokamak plasmas
Madalina Vlad, Dragos Iustin Palade, Florin Spineanu
A process specific to the dynamics of the heavy impurities in turbulent tokamak plasmas is found and analysed. We show that the parallel stochastic acceleration is strongly coupled…
Fast generation of Gaussian random fields for direct numerical simulations of stochastic transport
D. I. Palade, M. Vlad
We propose a novel discrete method of constructing Gaussian Random Fields (GRF) based on a combination of modified spectral representations, Fourier and Blob. The method is intende…
Helical inward orbits of high- impurities
F. Spineanu, M. Vlad
In a tokamak the edge and the central region may become connected by helical orbits resulting from the combination of global poloidal rotation and localized radial shifts. The rota…
Hidden drifts in turbulence
Madalina Vlad, Florin Spineanu
The paper defines and discusses the concept of hidden drifts in two-dimensional turbulence. These are ordered components of the trajectories that average to zero and do not produce…