Involved people at OAB: Bedogni, Londrillo.
Bedogni, in collaboration with A. Di Fazio (Astronomical Observatory of Rome) and V. Urpim (St. Petersburg University), concluded the study of the turbulence in a viscous fluid flow around a sphere by means of numerical 2D simulations. With the derived relation connecting the Reynolds number with the drag function for various Mach numbers, it will be possible to obtain a better modelization of the processes involved in galaxy and star formation.
Bedogni and Londrillo, are exploring numerically the development of turbulence, in order to compare the reliability of the most common numerical schemes used for the solution of the hydrodynamical equations (as, for example, PPM Lagrangean and Eulerian schemes, high order upwind schemes, and so on).
Londrillo, in collaboration with M. Velli and L. Del Zanna (University of Florence), developed a numerical code aimed to an accurate modelization of the solar wind and the consequent clarification of the long-standing problem of the heating of the solar corona. The code can be also applied succesfully to the study of the formation of stellar jets, and, more generally, to the study of compressible turbulence in astrophysical contexts. Moreover, up-wind numerical techniques of high-order in the MHD case have been studied, and applied to the study of the interaction between compressible (shocks) and incompressible (Alfven waves) modes.