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- Stefano Berti, Cristobal Lopez Lopez, Davide Vergni, Angelo Vulpiani
- Physical review. E, Statistical, nonlinear, and…
- 2007

An autocatalytic reacting system with particles interacting at a finite distance is studied. We investigate the effects of the discrete-particle character of the model on properties like reaction rate, quenching phenomenon, and front propagation, focusing on differences with respect to the continuous case. We introduce a renormalized reaction rate depending… (More)

- Stefano Berti, Francisco Alves Dos Santos, +6 authors Angelo Vulpiani
- 2017

In the framework of Monitoring by Ocean Drifters (MONDO) project, a set of Lagrangian drifters were released in proximity of the Brazil Current, the western branch of the subtropical gyre in the South Atlantic Ocean. The experimental strategy of deploying part of the buoys in clusters offers the opportunity to examine relative dispersion on a wide range of… (More)

- Stefano Berti, A . Bistagnino, Guido Boffetta, Antonio Celani, Stefano Musacchio
- Physical review. E, Statistical, nonlinear, and…
- 2008

We report numerical evidence of elastic turbulence phenomenology in a two-dimensional periodic Kolmogorov flow. By direct numerical simulations of the Oldroyd-B viscoelastic model at very small Reynolds numbers, we find that above the elastic instability threshold the flow develops an elastic turbulent regime. We observe that both the turbulent drag and the… (More)

- Luigi D'Ambra, Stefano Berti, +7 authors Emilio Falco
- Il Giornale di chirurgia
- 2011

The role of laparoscopic appendectomy in complicated appendicitis is still not widely accepted. The authors report their retrospective study performed to evaluate the effectiveness of the laparoscopic approach in the management of complicated appendicitis. From January 2003 to October 2008, 552 patients underwent appendectomy in our surgical department.… (More)

- Michaël Garcia, Stefano Berti, Philippe Peyla, Salima Rafaï
- Physical review. E, Statistical, nonlinear, and…
- 2011

Swimming at a micrometer scale demands particular strategies. When inertia is negligible compared to viscous forces, hydrodynamics equations are reversible in time. To achieve propulsion, microswimmers must therefore deform in a way that is not invariant under time reversal. Here, we investigate dispersal properties of the microalga Chlamydomonas… (More)

- P. Lavisci, Stefano Berti, Benedetto Pizzo, Pascal Triboulot, Roberto Zanuttini
- Holz als Roh- und Werkstoff
- 2001

- Stefano Berti, Guido Boffetta, Massimo Cencini, Angelo Vulpiani
- Physical review letters
- 2005

Phase separation between two fluids in two dimensions is investigated by means of direct numerical simulations of coupled Navier-Stokes and Cahn-Hilliard equations. We study the phase ordering process in the presence of an external stirring acting on the velocity field. For both active and passive mixtures we find that, for a sufficiently strong stirring,… (More)

- Stefano Berti, Guido Boffetta
- Physical review. E, Statistical, nonlinear, and…
- 2010

We investigate the dynamics of the two-dimensional periodic Kolmogorov flow of a viscoelastic fluid, described by the Oldroyd-B model, by means of direct numerical simulations. Above a critical Weissenberg number the flow displays a transition from stationary to randomly fluctuating states, via periodic ones. The increasing complexity of the flow in both… (More)

- P. Lavisci, Stefano Berti, Benedetto Pizzo, Pascal Triboulot, Roberto Zanuttini
- Holz als Roh- und Werkstoff
- 2001

A test method was developed for the measurement of delamination of structural wood adhesives applied in thick joints. Large differences were observed within a range of 8 commercial epoxy-based products.

– The small-scale statistics of homogeneous isotropic turbulence of dilute polymer solutions is investigated by means of direct numerical simulations of a simplified viscoelastic fluid model. It is found that polymers only partially suppress the turbulent cascade below the Lumley scale, leaving a remnant energy flux even for large elasticity. As a… (More)