2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/102706The hydrodynamics for a gas of hard-spheres which sometimes experience inelastic collisions resulting in the loss of a fixed, velocity-independent, amount of energy $Δ$ is investigated with the goal of understanding the coupling between hydrodynamics and endothermic chemistry. The homogeneous cooling state of a uniform system and the modified Navier-Stokes equations are discussed and explicit expressions given for the pressure, cooling rates and all transport coefficients for D-dimensions. The Navier-Stokes equations are solved numerically for the case of a two-dimensional gas subject to a circular piston so as to illustrate the effects of the enegy loss on the structure of shocks found in cavitating bubbles. It is found that the maximal temperature achieved is a sensitive function of $Δ$ with a minimum occuring near the physically important value of $Δ\sim 12,000K \sim 1eV$35 pages, 9 figuresSoft Condensed MatterStatistical Mechanicstext