20 citations · 40 across the 9 of their papers we have counts for
9 papers
Origin of Multifractality in Solar Wind Turbulence: the Role of Current Sheets
Leonardo F. Gomes, Tiago F. P. Gomes, Erico L. Rempel +1
In this work, a multifractal framework is proposed to investigate the effects of current sheets in solar wind turbulence. By using multifractal detrended fluctuation analysis coupl…
Computation of kinematic and magnetic -effect and eddy diffusivity tensors by Padé approximation
Sílvio M. A. Gama, Roman Chertovskih, Vladislav Zheligovsky
We present examples of Padé approximation of the -effect and eddy viscosity/diffusivity tensors in various flows. Expressions for the tensors derived in the framework of the sta…
Point-source dispersion of quasi-neutrally-buoyant inertial particles
Marco Martins Afonso, Sílvio M. A. Gama
We analyze the evolution of the distribution, both in the phase space and in the physical space, of inertial particles released by a spatially-localized (punctual) source and advec…
Eddy diffusivity of quasi-neutrally-buoyant inertial particles
Marco Martins Afonso, Paolo Muratore-Ginanneschi, Sílvio M. A. Gama +1
We investigate the large-scale transport properties of quasi-neutrally-buoyant inertial particles carried by incompressible zero-mean periodic or steady ergodic flows. We show how…
Settling velocity of quasi-neutrally-buoyant inertial particles
Marco Martins Afonso, Sílvio Marques de Almeida Gama
We investigate the sedimentation properties of quasi-neutrally buoyant inertial particles carried by incompressible zero-mean fluid flows. We obtain generic formulae for the termin…
Combined role of molecular diffusion, mean streaming and helicity in the eddy diffusivity of short-correlated random flows
Marco Martins Afonso, Andrea Mazzino, Sílvio Gama
We analytically investigate the effective-diffusivity tensor of a tracer particle in a fluid flow endowed with a short correlation time. By means of functional calculus and a multi…