Cosmic Cavitation: The Kinematic Lifecycle of a Bounded Universe

Standard LambdaCDM cosmology increasingly relies on unobservable free parameters—such as Dark Energy, Dark Matter, and an Inflaton field—to reconcile mounting observational anomalies. Cosmic Cavitation: The Kinematic Lifecycle of a Bounded Universe presents the foundational theoretical framework of Shock-Front Cosmology (SFC), replacing metric space stretching with a purely kinematic fluid dynamics model. Applying Occam’s Razor to cosmic architecture, SFC models the universe as a dual-front shock system propagating through an Ambient External Medium (AEM). Utilizing established fluid mechanics (Rankine-Hugoniot conditions, Rayleigh-Taylor, and Richtmyer-Meshkov instabilities), this framework outlines a closed, mass-balanced thermodynamic engine. The model maps a complete cyclical timeline progressing from a radial pressure-driven expansion—which naturally resolves the H0 tension and the JWST early galaxy paradox—to a hydrostatic collapse, boundary detrainment, and a subsequent hydrodynamic bounce.