36 citations · 210 across the 44 of their papers we have counts for
29 papers · 1 filter
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…
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…
On the late phase of relaxation of two-dimensional fluids: turbulence of unitons
F. Spineanu, M. Vlad
The two-dimensional ideal fluid and the plasma confined by a strong magnetic field exhibit an intrinsic tendency to organization due to the inverse spectral cascade. In the asympto…
Random and quasi-coherent aspects in particle motion and their effects on transport and turbulence evolution
M. Vlad, F. Spineanu
The quasi-coherent effects in two-dimensional incompressible turbulence are analyzed starting from the test particle trajectories. They can acquire coherent aspects when the stocha…