Authors: N E Molevich D I Zavershinsky R N Galimov V G Makaryan
Publish Date: 2011/04/05
Volume: 334, Issue: 1, Pages: 35-
Abstract
The isentropic thermal instability of media with a generalized heatloss function and negative bulk viscosity condition are discussed We obtain the nonlinear equation taking into account the nonlinear saturation of the isentropic instability This equation describes the nonstationary evolution of acoustical waves in media with the isentropic instability Its stationary solutions are investigated analytically The most interesting solution is the selfsustained pulse Using the numerical simulation of the nonlinear acoustical equation and the full system of onedimensional nonstationary hydrodynamical equations we showed the disintegration of the initial weak perturbation of compression into sequence of these selfsustained pulses in lowdensity PDRs
Keywords: