As a framework for handling low Mach number limits we consider notion of measure-valued solution the incompressible Euler system which explicitly formulates usually suppressed dependence on pressure variable. We clarify in sense such is generated as limit and state sufficient conditions this convergence. For special case pressure-free solutions are able to give only itself. necessary condition ...

The current paradigm of cosmic ray (CR) origin states that the most part galactic CRs is produced by supernova remnants. interaction ejecta with interstellar medium after supernova's explosions results in shocks responsible for CR acceleration via diffusive shock (DSA). We use particle-in-cell (PIC) simulations and a combined PIC-magnetohydrodynamic (PIC-MHD) technique to investigate whether DS...

The reflection coefficient of the open end belongs among essential parameters in physical description a flue organ pipe. It leads directly to practical topics such as pipe scaling. In this article, sound propagation is investigated inside an with most intense mean flow that achievable under musically relevant conditions. A theoretical model tested against experimental data obtain suitable formu...

A numerical investigation has been conducted into the influence of flow compressibility effects around an open-wheeled racing car. A geometry was created to comply with 2012 F1 regulations. Incompressible and compressible CFD simulations were comparedfirstly with models which maintained Reynolds number as Mach number increased, and secondly allowing Mach number and Reynolds number to increase t...