38 citations · 133 across the 13 of their papers we have counts for
13 papers
Tracking Point Vortices and Circulations via Advected Passive Particles: an Estimation Approach
Gil Marques, Marco Martins Afonso, Sílvio Gama
We present a novel method for estimating the circulations and positions of point vortices using trajectory data of passive particles in the presence of Gaussian noise. The method c…
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…
Anomalous diffusion for inertial particles under gravity in parallel flows
Marco Martins Afonso
We investigate the bounds between normal or anomalous effective diffusion for inertial particles transported by parallel flows. The infrared behavior of the fluid kinetic-energy sp…
Eddy diffusivities of inertial particles under gravity
Marco Martins Afonso, Andrea Mazzino, Paolo Muratore-Ginanneschi
The large-scale/long-time transport of inertial particles of arbitrary mass density under gravity is investigated by means of a formal multiple-scale perturbative expansion in the…
Recent Fluid Deformation closure for velocity gradient tensor dynamics in turbulence: time-scale effects and expansions
Marco Martins Afonso, Charles Meneveau
In order to model pressure and viscous terms in the equation for the Lagrangian dynamics of the velocity gradient tensor in turbulent flows, Chevillard & Meneveau (Phys. Rev. Lett.…