B
J
Last name: BEC
First name: J.
Journal of Fluid Mechanics, 528, pp. 255-277, http://dx.doi.org./10.1017/s002211003368
Physics Reports, 447, pp. 1-2, http://dx.doi.org./10.1016/j.physrep..04.002
International audience
The dynamics of neutrally buoyant particles transported by a turbulent flow is investigated for spherical particles with radii of the order of the Kolmogorov dissipative scale or larger. The pseudo-penalization spectral method that has been proposed by Pasquetti et al. (Appl. Numer. Math., vol. 58, 2008, pp. 946-954) is adapted to integrate...
New Journal of Physics, 9, p. 77, http://dx.doi.org./10.1088/1367-2630/9/3/077
Physica D Nonlinear Phenomena, 226, pp. 11-22, http://dx.doi.org./10.1016/j.physd.2006.10.007
Fluid Dynamics Research, 36, pp. 221-237
The dynamics of the multi-dimensional randomly forced Burgers equation is studied in the limit of vanishing viscosity. It is shown both theoretically and numerically that the shocks have a universal global structure which is determined by the topology of the configuration space. This structure is shown to be particularly rigid for the case of...
Fluid Dynamics Research, 36, pp. 221-237, http://dx.doi.org./10.1016/j.fluiddyn.2004.03.005
A statistical description of heavy particles suspended in incompressible rough self-similar flows is developed. It is shown that, differently from smooth flows, particles do not form fractal clusters. They rather distribute inhomogeneously with a statistics that only depends on a local Stokes number, given by the ratio between the particles'...
We are interested in the tail behavior of the pdf of mass density within the one and d-dimensional Burgers/adhesion model used, e.g., to model the formation of large-scale structures in the Universe after baryon–photon decoupling. We show that large densities are localized near "kurtoparabolic" singularities residing on space–time manifolds of...
Does three-dimensional incompressible Euler flow with smooth initial conditions develop a singularity with infinite vorticity after a finite time? This blowup problem is still open. After briefly reviewing what is known and pointing out some of the difficulties, we propose to tackle this issue for the class of flows having analytic initial data...
Fluid Dynamics Research, 36, pp. 221-237
International audience
Fluid Dynamics Research, 36, pp. 221-237, http://dx.doi.org./10.1016/j.fluiddyn.2004.03.005
Physica D Nonlinear Phenomena, 237, pp. 1951-1955, http://dx.doi.org./10.1016/j.physd.2007.11.007
Burgers turbulence subject to a force $f(x,t)=\sum_jf_j(x)\delta(t-t_j)$, where the $t_j$'s are ``kicking times'' and the ``impulses'' $f_j(x)$ have arbitrary space dependence, combines features of the purely decaying and the continuously forced cases. With large-scale forcing this ``kicked'' Burgers turbulence presents many of the regimes...
International audience
Fluid Dynamics Research, 36, pp. 221-237
Physics of Fluids, 17, p. 1706, http://dx.doi.org./10.1063/1.2008994